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| /* | |
| * Copyright (C) 2006 The Android Open Source Project | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| package android.view; | |
| import android.animation.AnimatorInflater; | |
| import android.animation.StateListAnimator; | |
| import android.annotation.CallSuper; | |
| import android.annotation.ColorInt; | |
| import android.annotation.DrawableRes; | |
| import android.annotation.FloatRange; | |
| import android.annotation.IdRes; | |
| import android.annotation.IntDef; | |
| import android.annotation.LayoutRes; | |
| import android.annotation.NonNull; | |
| import android.annotation.Nullable; | |
| import android.annotation.Size; | |
| import android.annotation.UiThread; | |
| import android.content.ClipData; | |
| import android.content.Context; | |
| import android.content.ContextWrapper; | |
| import android.content.Intent; | |
| import android.content.res.ColorStateList; | |
| import android.content.res.Configuration; | |
| import android.content.res.Resources; | |
| import android.content.res.TypedArray; | |
| import android.graphics.Bitmap; | |
| import android.graphics.Canvas; | |
| import android.graphics.Insets; | |
| import android.graphics.Interpolator; | |
| import android.graphics.LinearGradient; | |
| import android.graphics.Matrix; | |
| import android.graphics.Outline; | |
| import android.graphics.Paint; | |
| import android.graphics.PixelFormat; | |
| import android.graphics.Point; | |
| import android.graphics.PorterDuff; | |
| import android.graphics.PorterDuffXfermode; | |
| import android.graphics.Rect; | |
| import android.graphics.RectF; | |
| import android.graphics.Region; | |
| import android.graphics.Shader; | |
| import android.graphics.drawable.ColorDrawable; | |
| import android.graphics.drawable.Drawable; | |
| import android.hardware.display.DisplayManagerGlobal; | |
| import android.os.Build.VERSION_CODES; | |
| import android.os.Bundle; | |
| import android.os.Handler; | |
| import android.os.IBinder; | |
| import android.os.Parcel; | |
| import android.os.Parcelable; | |
| import android.os.RemoteException; | |
| import android.os.SystemClock; | |
| import android.os.SystemProperties; | |
| import android.os.Trace; | |
| import android.text.TextUtils; | |
| import android.util.AttributeSet; | |
| import android.util.FloatProperty; | |
| import android.util.LayoutDirection; | |
| import android.util.Log; | |
| import android.util.LongSparseLongArray; | |
| import android.util.Pools.SynchronizedPool; | |
| import android.util.Property; | |
| import android.util.SparseArray; | |
| import android.util.StateSet; | |
| import android.util.SuperNotCalledException; | |
| import android.util.TypedValue; | |
| import android.view.ContextMenu.ContextMenuInfo; | |
| import android.view.AccessibilityIterators.TextSegmentIterator; | |
| import android.view.AccessibilityIterators.CharacterTextSegmentIterator; | |
| import android.view.AccessibilityIterators.WordTextSegmentIterator; | |
| import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; | |
| import android.view.accessibility.AccessibilityEvent; | |
| import android.view.accessibility.AccessibilityEventSource; | |
| import android.view.accessibility.AccessibilityManager; | |
| import android.view.accessibility.AccessibilityNodeInfo; | |
| import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; | |
| import android.view.accessibility.AccessibilityNodeProvider; | |
| import android.view.animation.Animation; | |
| import android.view.animation.AnimationUtils; | |
| import android.view.animation.Transformation; | |
| import android.view.inputmethod.EditorInfo; | |
| import android.view.inputmethod.InputConnection; | |
| import android.view.inputmethod.InputMethodManager; | |
| import android.widget.Checkable; | |
| import android.widget.FrameLayout; | |
| import android.widget.ScrollBarDrawable; | |
| import static android.os.Build.VERSION_CODES.*; | |
| import static java.lang.Math.max; | |
| import com.android.internal.R; | |
| import com.android.internal.util.Predicate; | |
| import com.android.internal.view.menu.MenuBuilder; | |
| import com.google.android.collect.Lists; | |
| import com.google.android.collect.Maps; | |
| import java.lang.annotation.Retention; | |
| import java.lang.annotation.RetentionPolicy; | |
| import java.lang.ref.WeakReference; | |
| import java.lang.reflect.Field; | |
| import java.lang.reflect.InvocationTargetException; | |
| import java.lang.reflect.Method; | |
| import java.lang.reflect.Modifier; | |
| import java.util.ArrayList; | |
| import java.util.Arrays; | |
| import java.util.Collections; | |
| import java.util.HashMap; | |
| import java.util.List; | |
| import java.util.Locale; | |
| import java.util.Map; | |
| import java.util.concurrent.CopyOnWriteArrayList; | |
| import java.util.concurrent.atomic.AtomicInteger; | |
| /** | |
| * <p> | |
| * This class represents the basic building block for user interface components. A View | |
| * occupies a rectangular area on the screen and is responsible for drawing and | |
| * event handling. View is the base class for <em>widgets</em>, which are | |
| * used to create interactive UI components (buttons, text fields, etc.). The | |
| * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which | |
| * are invisible containers that hold other Views (or other ViewGroups) and define | |
| * their layout properties. | |
| * </p> | |
| * | |
| * <div class="special reference"> | |
| * <h3>Developer Guides</h3> | |
| * <p>For information about using this class to develop your application's user interface, | |
| * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. | |
| * </div> | |
| * | |
| * <a name="Using"></a> | |
| * <h3>Using Views</h3> | |
| * <p> | |
| * All of the views in a window are arranged in a single tree. You can add views | |
| * either from code or by specifying a tree of views in one or more XML layout | |
| * files. There are many specialized subclasses of views that act as controls or | |
| * are capable of displaying text, images, or other content. | |
| * </p> | |
| * <p> | |
| * Once you have created a tree of views, there are typically a few types of | |
| * common operations you may wish to perform: | |
| * <ul> | |
| * <li><strong>Set properties:</strong> for example setting the text of a | |
| * {@link android.widget.TextView}. The available properties and the methods | |
| * that set them will vary among the different subclasses of views. Note that | |
| * properties that are known at build time can be set in the XML layout | |
| * files.</li> | |
| * <li><strong>Set focus:</strong> The framework will handled moving focus in | |
| * response to user input. To force focus to a specific view, call | |
| * {@link #requestFocus}.</li> | |
| * <li><strong>Set up listeners:</strong> Views allow clients to set listeners | |
| * that will be notified when something interesting happens to the view. For | |
| * example, all views will let you set a listener to be notified when the view | |
| * gains or loses focus. You can register such a listener using | |
| * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. | |
| * Other view subclasses offer more specialized listeners. For example, a Button | |
| * exposes a listener to notify clients when the button is clicked.</li> | |
| * <li><strong>Set visibility:</strong> You can hide or show views using | |
| * {@link #setVisibility(int)}.</li> | |
| * </ul> | |
| * </p> | |
| * <p><em> | |
| * Note: The Android framework is responsible for measuring, laying out and | |
| * drawing views. You should not call methods that perform these actions on | |
| * views yourself unless you are actually implementing a | |
| * {@link android.view.ViewGroup}. | |
| * </em></p> | |
| * | |
| * <a name="Lifecycle"></a> | |
| * <h3>Implementing a Custom View</h3> | |
| * | |
| * <p> | |
| * To implement a custom view, you will usually begin by providing overrides for | |
| * some of the standard methods that the framework calls on all views. You do | |
| * not need to override all of these methods. In fact, you can start by just | |
| * overriding {@link #onDraw(android.graphics.Canvas)}. | |
| * <table border="2" width="85%" align="center" cellpadding="5"> | |
| * <thead> | |
| * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> | |
| * </thead> | |
| * | |
| * <tbody> | |
| * <tr> | |
| * <td rowspan="2">Creation</td> | |
| * <td>Constructors</td> | |
| * <td>There is a form of the constructor that are called when the view | |
| * is created from code and a form that is called when the view is | |
| * inflated from a layout file. The second form should parse and apply | |
| * any attributes defined in the layout file. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onFinishInflate()}</code></td> | |
| * <td>Called after a view and all of its children has been inflated | |
| * from XML.</td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td rowspan="3">Layout</td> | |
| * <td><code>{@link #onMeasure(int, int)}</code></td> | |
| * <td>Called to determine the size requirements for this view and all | |
| * of its children. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> | |
| * <td>Called when this view should assign a size and position to all | |
| * of its children. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> | |
| * <td>Called when the size of this view has changed. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td>Drawing</td> | |
| * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> | |
| * <td>Called when the view should render its content. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td rowspan="4">Event processing</td> | |
| * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> | |
| * <td>Called when a new hardware key event occurs. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> | |
| * <td>Called when a hardware key up event occurs. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> | |
| * <td>Called when a trackball motion event occurs. | |
| * </td> | |
| * </tr> | |
| * <tr> | |
| * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> | |
| * <td>Called when a touch screen motion event occurs. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td rowspan="2">Focus</td> | |
| * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> | |
| * <td>Called when the view gains or loses focus. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> | |
| * <td>Called when the window containing the view gains or loses focus. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td rowspan="3">Attaching</td> | |
| * <td><code>{@link #onAttachedToWindow()}</code></td> | |
| * <td>Called when the view is attached to a window. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td><code>{@link #onDetachedFromWindow}</code></td> | |
| * <td>Called when the view is detached from its window. | |
| * </td> | |
| * </tr> | |
| * | |
| * <tr> | |
| * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> | |
| * <td>Called when the visibility of the window containing the view | |
| * has changed. | |
| * </td> | |
| * </tr> | |
| * </tbody> | |
| * | |
| * </table> | |
| * </p> | |
| * | |
| * <a name="IDs"></a> | |
| * <h3>IDs</h3> | |
| * Views may have an integer id associated with them. These ids are typically | |
| * assigned in the layout XML files, and are used to find specific views within | |
| * the view tree. A common pattern is to: | |
| * <ul> | |
| * <li>Define a Button in the layout file and assign it a unique ID. | |
| * <pre> | |
| * <Button | |
| * android:id="@+id/my_button" | |
| * android:layout_width="wrap_content" | |
| * android:layout_height="wrap_content" | |
| * android:text="@string/my_button_text"/> | |
| * </pre></li> | |
| * <li>From the onCreate method of an Activity, find the Button | |
| * <pre class="prettyprint"> | |
| * Button myButton = (Button) findViewById(R.id.my_button); | |
| * </pre></li> | |
| * </ul> | |
| * <p> | |
| * View IDs need not be unique throughout the tree, but it is good practice to | |
| * ensure that they are at least unique within the part of the tree you are | |
| * searching. | |
| * </p> | |
| * | |
| * <a name="Position"></a> | |
| * <h3>Position</h3> | |
| * <p> | |
| * The geometry of a view is that of a rectangle. A view has a location, | |
| * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and | |
| * two dimensions, expressed as a width and a height. The unit for location | |
| * and dimensions is the pixel. | |
| * </p> | |
| * | |
| * <p> | |
| * It is possible to retrieve the location of a view by invoking the methods | |
| * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, | |
| * coordinate of the rectangle representing the view. The latter returns the | |
| * top, or Y, coordinate of the rectangle representing the view. These methods | |
| * both return the location of the view relative to its parent. For instance, | |
| * when getLeft() returns 20, that means the view is located 20 pixels to the | |
| * right of the left edge of its direct parent. | |
| * </p> | |
| * | |
| * <p> | |
| * In addition, several convenience methods are offered to avoid unnecessary | |
| * computations, namely {@link #getRight()} and {@link #getBottom()}. | |
| * These methods return the coordinates of the right and bottom edges of the | |
| * rectangle representing the view. For instance, calling {@link #getRight()} | |
| * is similar to the following computation: <code>getLeft() + getWidth()</code> | |
| * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) | |
| * </p> | |
| * | |
| * <a name="SizePaddingMargins"></a> | |
| * <h3>Size, padding and margins</h3> | |
| * <p> | |
| * The size of a view is expressed with a width and a height. A view actually | |
| * possess two pairs of width and height values. | |
| * </p> | |
| * | |
| * <p> | |
| * The first pair is known as <em>measured width</em> and | |
| * <em>measured height</em>. These dimensions define how big a view wants to be | |
| * within its parent (see <a href="#Layout">Layout</a> for more details.) The | |
| * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} | |
| * and {@link #getMeasuredHeight()}. | |
| * </p> | |
| * | |
| * <p> | |
| * The second pair is simply known as <em>width</em> and <em>height</em>, or | |
| * sometimes <em>drawing width</em> and <em>drawing height</em>. These | |
| * dimensions define the actual size of the view on screen, at drawing time and | |
| * after layout. These values may, but do not have to, be different from the | |
| * measured width and height. The width and height can be obtained by calling | |
| * {@link #getWidth()} and {@link #getHeight()}. | |
| * </p> | |
| * | |
| * <p> | |
| * To measure its dimensions, a view takes into account its padding. The padding | |
| * is expressed in pixels for the left, top, right and bottom parts of the view. | |
| * Padding can be used to offset the content of the view by a specific amount of | |
| * pixels. For instance, a left padding of 2 will push the view's content by | |
| * 2 pixels to the right of the left edge. Padding can be set using the | |
| * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} | |
| * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, | |
| * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, | |
| * {@link #getPaddingEnd()}. | |
| * </p> | |
| * | |
| * <p> | |
| * Even though a view can define a padding, it does not provide any support for | |
| * margins. However, view groups provide such a support. Refer to | |
| * {@link android.view.ViewGroup} and | |
| * {@link android.view.ViewGroup.MarginLayoutParams} for further information. | |
| * </p> | |
| * | |
| * <a name="Layout"></a> | |
| * <h3>Layout</h3> | |
| * <p> | |
| * Layout is a two pass process: a measure pass and a layout pass. The measuring | |
| * pass is implemented in {@link #measure(int, int)} and is a top-down traversal | |
| * of the view tree. Each view pushes dimension specifications down the tree | |
| * during the recursion. At the end of the measure pass, every view has stored | |
| * its measurements. The second pass happens in | |
| * {@link #layout(int,int,int,int)} and is also top-down. During | |
| * this pass each parent is responsible for positioning all of its children | |
| * using the sizes computed in the measure pass. | |
| * </p> | |
| * | |
| * <p> | |
| * When a view's measure() method returns, its {@link #getMeasuredWidth()} and | |
| * {@link #getMeasuredHeight()} values must be set, along with those for all of | |
| * that view's descendants. A view's measured width and measured height values | |
| * must respect the constraints imposed by the view's parents. This guarantees | |
| * that at the end of the measure pass, all parents accept all of their | |
| * children's measurements. A parent view may call measure() more than once on | |
| * its children. For example, the parent may measure each child once with | |
| * unspecified dimensions to find out how big they want to be, then call | |
| * measure() on them again with actual numbers if the sum of all the children's | |
| * unconstrained sizes is too big or too small. | |
| * </p> | |
| * | |
| * <p> | |
| * The measure pass uses two classes to communicate dimensions. The | |
| * {@link MeasureSpec} class is used by views to tell their parents how they | |
| * want to be measured and positioned. The base LayoutParams class just | |
| * describes how big the view wants to be for both width and height. For each | |
| * dimension, it can specify one of: | |
| * <ul> | |
| * <li> an exact number | |
| * <li>MATCH_PARENT, which means the view wants to be as big as its parent | |
| * (minus padding) | |
| * <li> WRAP_CONTENT, which means that the view wants to be just big enough to | |
| * enclose its content (plus padding). | |
| * </ul> | |
| * There are subclasses of LayoutParams for different subclasses of ViewGroup. | |
| * For example, AbsoluteLayout has its own subclass of LayoutParams which adds | |
| * an X and Y value. | |
| * </p> | |
| * | |
| * <p> | |
| * MeasureSpecs are used to push requirements down the tree from parent to | |
| * child. A MeasureSpec can be in one of three modes: | |
| * <ul> | |
| * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension | |
| * of a child view. For example, a LinearLayout may call measure() on its child | |
| * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how | |
| * tall the child view wants to be given a width of 240 pixels. | |
| * <li>EXACTLY: This is used by the parent to impose an exact size on the | |
| * child. The child must use this size, and guarantee that all of its | |
| * descendants will fit within this size. | |
| * <li>AT_MOST: This is used by the parent to impose a maximum size on the | |
| * child. The child must guarantee that it and all of its descendants will fit | |
| * within this size. | |
| * </ul> | |
| * </p> | |
| * | |
| * <p> | |
| * To initiate a layout, call {@link #requestLayout}. This method is typically | |
| * called by a view on itself when it believes that is can no longer fit within | |
| * its current bounds. | |
| * </p> | |
| * | |
| * <a name="Drawing"></a> | |
| * <h3>Drawing</h3> | |
| * <p> | |
| * Drawing is handled by walking the tree and recording the drawing commands of | |
| * any View that needs to update. After this, the drawing commands of the | |
| * entire tree are issued to screen, clipped to the newly damaged area. | |
| * </p> | |
| * | |
| * <p> | |
| * The tree is largely recorded and drawn in order, with parents drawn before | |
| * (i.e., behind) their children, with siblings drawn in the order they appear | |
| * in the tree. If you set a background drawable for a View, then the View will | |
| * draw it before calling back to its <code>onDraw()</code> method. The child | |
| * drawing order can be overridden with | |
| * {@link ViewGroup#setChildrenDrawingOrderEnabled(boolean) custom child drawing order} | |
| * in a ViewGroup, and with {@link #setZ(float)} custom Z values} set on Views. | |
| * </p> | |
| * | |
| * <p> | |
| * To force a view to draw, call {@link #invalidate()}. | |
| * </p> | |
| * | |
| * <a name="EventHandlingThreading"></a> | |
| * <h3>Event Handling and Threading</h3> | |
| * <p> | |
| * The basic cycle of a view is as follows: | |
| * <ol> | |
| * <li>An event comes in and is dispatched to the appropriate view. The view | |
| * handles the event and notifies any listeners.</li> | |
| * <li>If in the course of processing the event, the view's bounds may need | |
| * to be changed, the view will call {@link #requestLayout()}.</li> | |
| * <li>Similarly, if in the course of processing the event the view's appearance | |
| * may need to be changed, the view will call {@link #invalidate()}.</li> | |
| * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, | |
| * the framework will take care of measuring, laying out, and drawing the tree | |
| * as appropriate.</li> | |
| * </ol> | |
| * </p> | |
| * | |
| * <p><em>Note: The entire view tree is single threaded. You must always be on | |
| * the UI thread when calling any method on any view.</em> | |
| * If you are doing work on other threads and want to update the state of a view | |
| * from that thread, you should use a {@link Handler}. | |
| * </p> | |
| * | |
| * <a name="FocusHandling"></a> | |
| * <h3>Focus Handling</h3> | |
| * <p> | |
| * The framework will handle routine focus movement in response to user input. | |
| * This includes changing the focus as views are removed or hidden, or as new | |
| * views become available. Views indicate their willingness to take focus | |
| * through the {@link #isFocusable} method. To change whether a view can take | |
| * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) | |
| * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} | |
| * and can change this via {@link #setFocusableInTouchMode(boolean)}. | |
| * </p> | |
| * <p> | |
| * Focus movement is based on an algorithm which finds the nearest neighbor in a | |
| * given direction. In rare cases, the default algorithm may not match the | |
| * intended behavior of the developer. In these situations, you can provide | |
| * explicit overrides by using these XML attributes in the layout file: | |
| * <pre> | |
| * nextFocusDown | |
| * nextFocusLeft | |
| * nextFocusRight | |
| * nextFocusUp | |
| * </pre> | |
| * </p> | |
| * | |
| * | |
| * <p> | |
| * To get a particular view to take focus, call {@link #requestFocus()}. | |
| * </p> | |
| * | |
| * <a name="TouchMode"></a> | |
| * <h3>Touch Mode</h3> | |
| * <p> | |
| * When a user is navigating a user interface via directional keys such as a D-pad, it is | |
| * necessary to give focus to actionable items such as buttons so the user can see | |
| * what will take input. If the device has touch capabilities, however, and the user | |
| * begins interacting with the interface by touching it, it is no longer necessary to | |
| * always highlight, or give focus to, a particular view. This motivates a mode | |
| * for interaction named 'touch mode'. | |
| * </p> | |
| * <p> | |
| * For a touch capable device, once the user touches the screen, the device | |
| * will enter touch mode. From this point onward, only views for which | |
| * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. | |
| * Other views that are touchable, like buttons, will not take focus when touched; they will | |
| * only fire the on click listeners. | |
| * </p> | |
| * <p> | |
| * Any time a user hits a directional key, such as a D-pad direction, the view device will | |
| * exit touch mode, and find a view to take focus, so that the user may resume interacting | |
| * with the user interface without touching the screen again. | |
| * </p> | |
| * <p> | |
| * The touch mode state is maintained across {@link android.app.Activity}s. Call | |
| * {@link #isInTouchMode} to see whether the device is currently in touch mode. | |
| * </p> | |
| * | |
| * <a name="Scrolling"></a> | |
| * <h3>Scrolling</h3> | |
| * <p> | |
| * The framework provides basic support for views that wish to internally | |
| * scroll their content. This includes keeping track of the X and Y scroll | |
| * offset as well as mechanisms for drawing scrollbars. See | |
| * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and | |
| * {@link #awakenScrollBars()} for more details. | |
| * </p> | |
| * | |
| * <a name="Tags"></a> | |
| * <h3>Tags</h3> | |
| * <p> | |
| * Unlike IDs, tags are not used to identify views. Tags are essentially an | |
| * extra piece of information that can be associated with a view. They are most | |
| * often used as a convenience to store data related to views in the views | |
| * themselves rather than by putting them in a separate structure. | |
| * </p> | |
| * | |
| * <a name="Properties"></a> | |
| * <h3>Properties</h3> | |
| * <p> | |
| * The View class exposes an {@link #ALPHA} property, as well as several transform-related | |
| * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are | |
| * available both in the {@link Property} form as well as in similarly-named setter/getter | |
| * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can | |
| * be used to set persistent state associated with these rendering-related properties on the view. | |
| * The properties and methods can also be used in conjunction with | |
| * {@link android.animation.Animator Animator}-based animations, described more in the | |
| * <a href="#Animation">Animation</a> section. | |
| * </p> | |
| * | |
| * <a name="Animation"></a> | |
| * <h3>Animation</h3> | |
| * <p> | |
| * Starting with Android 3.0, the preferred way of animating views is to use the | |
| * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based | |
| * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and | |
| * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 | |
| * {@link android.view.animation.Animation Animation}-based classes, which instead animate only | |
| * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class | |
| * makes animating these View properties particularly easy and efficient. | |
| * </p> | |
| * <p> | |
| * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. | |
| * You can attach an {@link Animation} object to a view using | |
| * {@link #setAnimation(Animation)} or | |
| * {@link #startAnimation(Animation)}. The animation can alter the scale, | |
| * rotation, translation and alpha of a view over time. If the animation is | |
| * attached to a view that has children, the animation will affect the entire | |
| * subtree rooted by that node. When an animation is started, the framework will | |
| * take care of redrawing the appropriate views until the animation completes. | |
| * </p> | |
| * | |
| * <a name="Security"></a> | |
| * <h3>Security</h3> | |
| * <p> | |
| * Sometimes it is essential that an application be able to verify that an action | |
| * is being performed with the full knowledge and consent of the user, such as | |
| * granting a permission request, making a purchase or clicking on an advertisement. | |
| * Unfortunately, a malicious application could try to spoof the user into | |
| * performing these actions, unaware, by concealing the intended purpose of the view. | |
| * As a remedy, the framework offers a touch filtering mechanism that can be used to | |
| * improve the security of views that provide access to sensitive functionality. | |
| * </p><p> | |
| * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the | |
| * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework | |
| * will discard touches that are received whenever the view's window is obscured by | |
| * another visible window. As a result, the view will not receive touches whenever a | |
| * toast, dialog or other window appears above the view's window. | |
| * </p><p> | |
| * For more fine-grained control over security, consider overriding the | |
| * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own | |
| * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. | |
| * </p> | |
| * | |
| * @attr ref android.R.styleable#View_alpha | |
| * @attr ref android.R.styleable#View_background | |
| * @attr ref android.R.styleable#View_clickable | |
| * @attr ref android.R.styleable#View_contentDescription | |
| * @attr ref android.R.styleable#View_drawingCacheQuality | |
| * @attr ref android.R.styleable#View_duplicateParentState | |
| * @attr ref android.R.styleable#View_id | |
| * @attr ref android.R.styleable#View_requiresFadingEdge | |
| * @attr ref android.R.styleable#View_fadeScrollbars | |
| * @attr ref android.R.styleable#View_fadingEdgeLength | |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured | |
| * @attr ref android.R.styleable#View_fitsSystemWindows | |
| * @attr ref android.R.styleable#View_isScrollContainer | |
| * @attr ref android.R.styleable#View_focusable | |
| * @attr ref android.R.styleable#View_focusableInTouchMode | |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled | |
| * @attr ref android.R.styleable#View_keepScreenOn | |
| * @attr ref android.R.styleable#View_layerType | |
| * @attr ref android.R.styleable#View_layoutDirection | |
| * @attr ref android.R.styleable#View_longClickable | |
| * @attr ref android.R.styleable#View_minHeight | |
| * @attr ref android.R.styleable#View_minWidth | |
| * @attr ref android.R.styleable#View_nextFocusDown | |
| * @attr ref android.R.styleable#View_nextFocusLeft | |
| * @attr ref android.R.styleable#View_nextFocusRight | |
| * @attr ref android.R.styleable#View_nextFocusUp | |
| * @attr ref android.R.styleable#View_onClick | |
| * @attr ref android.R.styleable#View_padding | |
| * @attr ref android.R.styleable#View_paddingBottom | |
| * @attr ref android.R.styleable#View_paddingLeft | |
| * @attr ref android.R.styleable#View_paddingRight | |
| * @attr ref android.R.styleable#View_paddingTop | |
| * @attr ref android.R.styleable#View_paddingStart | |
| * @attr ref android.R.styleable#View_paddingEnd | |
| * @attr ref android.R.styleable#View_saveEnabled | |
| * @attr ref android.R.styleable#View_rotation | |
| * @attr ref android.R.styleable#View_rotationX | |
| * @attr ref android.R.styleable#View_rotationY | |
| * @attr ref android.R.styleable#View_scaleX | |
| * @attr ref android.R.styleable#View_scaleY | |
| * @attr ref android.R.styleable#View_scrollX | |
| * @attr ref android.R.styleable#View_scrollY | |
| * @attr ref android.R.styleable#View_scrollbarSize | |
| * @attr ref android.R.styleable#View_scrollbarStyle | |
| * @attr ref android.R.styleable#View_scrollbars | |
| * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade | |
| * @attr ref android.R.styleable#View_scrollbarFadeDuration | |
| * @attr ref android.R.styleable#View_scrollbarTrackHorizontal | |
| * @attr ref android.R.styleable#View_scrollbarThumbHorizontal | |
| * @attr ref android.R.styleable#View_scrollbarThumbVertical | |
| * @attr ref android.R.styleable#View_scrollbarTrackVertical | |
| * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack | |
| * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack | |
| * @attr ref android.R.styleable#View_stateListAnimator | |
| * @attr ref android.R.styleable#View_transitionName | |
| * @attr ref android.R.styleable#View_soundEffectsEnabled | |
| * @attr ref android.R.styleable#View_tag | |
| * @attr ref android.R.styleable#View_textAlignment | |
| * @attr ref android.R.styleable#View_textDirection | |
| * @attr ref android.R.styleable#View_transformPivotX | |
| * @attr ref android.R.styleable#View_transformPivotY | |
| * @attr ref android.R.styleable#View_translationX | |
| * @attr ref android.R.styleable#View_translationY | |
| * @attr ref android.R.styleable#View_translationZ | |
| * @attr ref android.R.styleable#View_visibility | |
| * | |
| * @see android.view.ViewGroup | |
| */ | |
| @UiThread | |
| public class View implements Drawable.Callback, KeyEvent.Callback, | |
| AccessibilityEventSource { | |
| private static final boolean DBG = false; | |
| /** | |
| * The logging tag used by this class with android.util.Log. | |
| */ | |
| protected static final String VIEW_LOG_TAG = "View"; | |
| /** | |
| * When set to true, apps will draw debugging information about their layouts. | |
| * | |
| * @hide | |
| */ | |
| public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; | |
| /** | |
| * When set to true, this view will save its attribute data. | |
| * | |
| * @hide | |
| */ | |
| public static boolean mDebugViewAttributes = false; | |
| /** | |
| * Used to mark a View that has no ID. | |
| */ | |
| public static final int NO_ID = -1; | |
| /** | |
| * Signals that compatibility booleans have been initialized according to | |
| * target SDK versions. | |
| */ | |
| private static boolean sCompatibilityDone = false; | |
| /** | |
| * Use the old (broken) way of building MeasureSpecs. | |
| */ | |
| private static boolean sUseBrokenMakeMeasureSpec = false; | |
| /** | |
| * Always return a size of 0 for MeasureSpec values with a mode of UNSPECIFIED | |
| */ | |
| static boolean sUseZeroUnspecifiedMeasureSpec = false; | |
| /** | |
| * Ignore any optimizations using the measure cache. | |
| */ | |
| private static boolean sIgnoreMeasureCache = false; | |
| /** | |
| * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when | |
| * calling setFlags. | |
| */ | |
| private static final int NOT_FOCUSABLE = 0x00000000; | |
| /** | |
| * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling | |
| * setFlags. | |
| */ | |
| private static final int FOCUSABLE = 0x00000001; | |
| /** | |
| * Mask for use with setFlags indicating bits used for focus. | |
| */ | |
| private static final int FOCUSABLE_MASK = 0x00000001; | |
| /** | |
| * This view will adjust its padding to fit sytem windows (e.g. status bar) | |
| */ | |
| private static final int FITS_SYSTEM_WINDOWS = 0x00000002; | |
| /** @hide */ | |
| @IntDef({VISIBLE, INVISIBLE, GONE}) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface Visibility {} | |
| /** | |
| * This view is visible. | |
| * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code | |
| * android:visibility}. | |
| */ | |
| public static final int VISIBLE = 0x00000000; | |
| /** | |
| * This view is invisible, but it still takes up space for layout purposes. | |
| * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code | |
| * android:visibility}. | |
| */ | |
| public static final int INVISIBLE = 0x00000004; | |
| /** | |
| * This view is invisible, and it doesn't take any space for layout | |
| * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code | |
| * android:visibility}. | |
| */ | |
| public static final int GONE = 0x00000008; | |
| /** | |
| * Mask for use with setFlags indicating bits used for visibility. | |
| * {@hide} | |
| */ | |
| static final int VISIBILITY_MASK = 0x0000000C; | |
| private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; | |
| /** | |
| * This view is enabled. Interpretation varies by subclass. | |
| * Use with ENABLED_MASK when calling setFlags. | |
| * {@hide} | |
| */ | |
| static final int ENABLED = 0x00000000; | |
| /** | |
| * This view is disabled. Interpretation varies by subclass. | |
| * Use with ENABLED_MASK when calling setFlags. | |
| * {@hide} | |
| */ | |
| static final int DISABLED = 0x00000020; | |
| /** | |
| * Mask for use with setFlags indicating bits used for indicating whether | |
| * this view is enabled | |
| * {@hide} | |
| */ | |
| static final int ENABLED_MASK = 0x00000020; | |
| /** | |
| * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be | |
| * called and further optimizations will be performed. It is okay to have | |
| * this flag set and a background. Use with DRAW_MASK when calling setFlags. | |
| * {@hide} | |
| */ | |
| static final int WILL_NOT_DRAW = 0x00000080; | |
| /** | |
| * Mask for use with setFlags indicating bits used for indicating whether | |
| * this view is will draw | |
| * {@hide} | |
| */ | |
| static final int DRAW_MASK = 0x00000080; | |
| /** | |
| * <p>This view doesn't show scrollbars.</p> | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_NONE = 0x00000000; | |
| /** | |
| * <p>This view shows horizontal scrollbars.</p> | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_HORIZONTAL = 0x00000100; | |
| /** | |
| * <p>This view shows vertical scrollbars.</p> | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_VERTICAL = 0x00000200; | |
| /** | |
| * <p>Mask for use with setFlags indicating bits used for indicating which | |
| * scrollbars are enabled.</p> | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_MASK = 0x00000300; | |
| /** | |
| * Indicates that the view should filter touches when its window is obscured. | |
| * Refer to the class comments for more information about this security feature. | |
| * {@hide} | |
| */ | |
| static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; | |
| /** | |
| * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate | |
| * that they are optional and should be skipped if the window has | |
| * requested system UI flags that ignore those insets for layout. | |
| */ | |
| static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; | |
| /** | |
| * <p>This view doesn't show fading edges.</p> | |
| * {@hide} | |
| */ | |
| static final int FADING_EDGE_NONE = 0x00000000; | |
| /** | |
| * <p>This view shows horizontal fading edges.</p> | |
| * {@hide} | |
| */ | |
| static final int FADING_EDGE_HORIZONTAL = 0x00001000; | |
| /** | |
| * <p>This view shows vertical fading edges.</p> | |
| * {@hide} | |
| */ | |
| static final int FADING_EDGE_VERTICAL = 0x00002000; | |
| /** | |
| * <p>Mask for use with setFlags indicating bits used for indicating which | |
| * fading edges are enabled.</p> | |
| * {@hide} | |
| */ | |
| static final int FADING_EDGE_MASK = 0x00003000; | |
| /** | |
| * <p>Indicates this view can be clicked. When clickable, a View reacts | |
| * to clicks by notifying the OnClickListener.<p> | |
| * {@hide} | |
| */ | |
| static final int CLICKABLE = 0x00004000; | |
| /** | |
| * <p>Indicates this view is caching its drawing into a bitmap.</p> | |
| * {@hide} | |
| */ | |
| static final int DRAWING_CACHE_ENABLED = 0x00008000; | |
| /** | |
| * <p>Indicates that no icicle should be saved for this view.<p> | |
| * {@hide} | |
| */ | |
| static final int SAVE_DISABLED = 0x000010000; | |
| /** | |
| * <p>Mask for use with setFlags indicating bits used for the saveEnabled | |
| * property.</p> | |
| * {@hide} | |
| */ | |
| static final int SAVE_DISABLED_MASK = 0x000010000; | |
| /** | |
| * <p>Indicates that no drawing cache should ever be created for this view.<p> | |
| * {@hide} | |
| */ | |
| static final int WILL_NOT_CACHE_DRAWING = 0x000020000; | |
| /** | |
| * <p>Indicates this view can take / keep focus when int touch mode.</p> | |
| * {@hide} | |
| */ | |
| static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; | |
| /** @hide */ | |
| @Retention(RetentionPolicy.SOURCE) | |
| @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) | |
| public @interface DrawingCacheQuality {} | |
| /** | |
| * <p>Enables low quality mode for the drawing cache.</p> | |
| */ | |
| public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; | |
| /** | |
| * <p>Enables high quality mode for the drawing cache.</p> | |
| */ | |
| public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; | |
| /** | |
| * <p>Enables automatic quality mode for the drawing cache.</p> | |
| */ | |
| public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; | |
| private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { | |
| DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH | |
| }; | |
| /** | |
| * <p>Mask for use with setFlags indicating bits used for the cache | |
| * quality property.</p> | |
| * {@hide} | |
| */ | |
| static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; | |
| /** | |
| * <p> | |
| * Indicates this view can be long clicked. When long clickable, a View | |
| * reacts to long clicks by notifying the OnLongClickListener or showing a | |
| * context menu. | |
| * </p> | |
| * {@hide} | |
| */ | |
| static final int LONG_CLICKABLE = 0x00200000; | |
| /** | |
| * <p>Indicates that this view gets its drawable states from its direct parent | |
| * and ignores its original internal states.</p> | |
| * | |
| * @hide | |
| */ | |
| static final int DUPLICATE_PARENT_STATE = 0x00400000; | |
| /** | |
| * <p> | |
| * Indicates this view can be context clicked. When context clickable, a View reacts to a | |
| * context click (e.g. a primary stylus button press or right mouse click) by notifying the | |
| * OnContextClickListener. | |
| * </p> | |
| * {@hide} | |
| */ | |
| static final int CONTEXT_CLICKABLE = 0x00800000; | |
| /** @hide */ | |
| @IntDef({ | |
| SCROLLBARS_INSIDE_OVERLAY, | |
| SCROLLBARS_INSIDE_INSET, | |
| SCROLLBARS_OUTSIDE_OVERLAY, | |
| SCROLLBARS_OUTSIDE_INSET | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface ScrollBarStyle {} | |
| /** | |
| * The scrollbar style to display the scrollbars inside the content area, | |
| * without increasing the padding. The scrollbars will be overlaid with | |
| * translucency on the view's content. | |
| */ | |
| public static final int SCROLLBARS_INSIDE_OVERLAY = 0; | |
| /** | |
| * The scrollbar style to display the scrollbars inside the padded area, | |
| * increasing the padding of the view. The scrollbars will not overlap the | |
| * content area of the view. | |
| */ | |
| public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; | |
| /** | |
| * The scrollbar style to display the scrollbars at the edge of the view, | |
| * without increasing the padding. The scrollbars will be overlaid with | |
| * translucency. | |
| */ | |
| public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; | |
| /** | |
| * The scrollbar style to display the scrollbars at the edge of the view, | |
| * increasing the padding of the view. The scrollbars will only overlap the | |
| * background, if any. | |
| */ | |
| public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; | |
| /** | |
| * Mask to check if the scrollbar style is overlay or inset. | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_INSET_MASK = 0x01000000; | |
| /** | |
| * Mask to check if the scrollbar style is inside or outside. | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; | |
| /** | |
| * Mask for scrollbar style. | |
| * {@hide} | |
| */ | |
| static final int SCROLLBARS_STYLE_MASK = 0x03000000; | |
| /** | |
| * View flag indicating that the screen should remain on while the | |
| * window containing this view is visible to the user. This effectively | |
| * takes care of automatically setting the WindowManager's | |
| * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. | |
| */ | |
| public static final int KEEP_SCREEN_ON = 0x04000000; | |
| /** | |
| * View flag indicating whether this view should have sound effects enabled | |
| * for events such as clicking and touching. | |
| */ | |
| public static final int SOUND_EFFECTS_ENABLED = 0x08000000; | |
| /** | |
| * View flag indicating whether this view should have haptic feedback | |
| * enabled for events such as long presses. | |
| */ | |
| public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; | |
| /** | |
| * <p>Indicates that the view hierarchy should stop saving state when | |
| * it reaches this view. If state saving is initiated immediately at | |
| * the view, it will be allowed. | |
| * {@hide} | |
| */ | |
| static final int PARENT_SAVE_DISABLED = 0x20000000; | |
| /** | |
| * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> | |
| * {@hide} | |
| */ | |
| static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; | |
| /** @hide */ | |
| @IntDef(flag = true, | |
| value = { | |
| FOCUSABLES_ALL, | |
| FOCUSABLES_TOUCH_MODE | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface FocusableMode {} | |
| /** | |
| * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} | |
| * should add all focusable Views regardless if they are focusable in touch mode. | |
| */ | |
| public static final int FOCUSABLES_ALL = 0x00000000; | |
| /** | |
| * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} | |
| * should add only Views focusable in touch mode. | |
| */ | |
| public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; | |
| /** @hide */ | |
| @IntDef({ | |
| FOCUS_BACKWARD, | |
| FOCUS_FORWARD, | |
| FOCUS_LEFT, | |
| FOCUS_UP, | |
| FOCUS_RIGHT, | |
| FOCUS_DOWN | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface FocusDirection {} | |
| /** @hide */ | |
| @IntDef({ | |
| FOCUS_LEFT, | |
| FOCUS_UP, | |
| FOCUS_RIGHT, | |
| FOCUS_DOWN | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus to the previous selectable | |
| * item. | |
| */ | |
| public static final int FOCUS_BACKWARD = 0x00000001; | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus to the next selectable | |
| * item. | |
| */ | |
| public static final int FOCUS_FORWARD = 0x00000002; | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus to the left. | |
| */ | |
| public static final int FOCUS_LEFT = 0x00000011; | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus up. | |
| */ | |
| public static final int FOCUS_UP = 0x00000021; | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus to the right. | |
| */ | |
| public static final int FOCUS_RIGHT = 0x00000042; | |
| /** | |
| * Use with {@link #focusSearch(int)}. Move focus down. | |
| */ | |
| public static final int FOCUS_DOWN = 0x00000082; | |
| /** | |
| * Bits of {@link #getMeasuredWidthAndState()} and | |
| * {@link #getMeasuredWidthAndState()} that provide the actual measured size. | |
| */ | |
| public static final int MEASURED_SIZE_MASK = 0x00ffffff; | |
| /** | |
| * Bits of {@link #getMeasuredWidthAndState()} and | |
| * {@link #getMeasuredWidthAndState()} that provide the additional state bits. | |
| */ | |
| public static final int MEASURED_STATE_MASK = 0xff000000; | |
| /** | |
| * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits | |
| * for functions that combine both width and height into a single int, | |
| * such as {@link #getMeasuredState()} and the childState argument of | |
| * {@link #resolveSizeAndState(int, int, int)}. | |
| */ | |
| public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; | |
| /** | |
| * Bit of {@link #getMeasuredWidthAndState()} and | |
| * {@link #getMeasuredWidthAndState()} that indicates the measured size | |
| * is smaller that the space the view would like to have. | |
| */ | |
| public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; | |
| /** | |
| * Base View state sets | |
| */ | |
| // Singles | |
| /** | |
| * Indicates the view has no states set. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] EMPTY_STATE_SET; | |
| /** | |
| * Indicates the view is enabled. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] ENABLED_STATE_SET; | |
| /** | |
| * Indicates the view is focused. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is selected. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] PRESSED_STATE_SET; | |
| /** | |
| * Indicates the view's window has focus. States are used with | |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the | |
| * view depending on its state. | |
| * | |
| * @see android.graphics.drawable.Drawable | |
| * @see #getDrawableState() | |
| */ | |
| protected static final int[] WINDOW_FOCUSED_STATE_SET; | |
| // Doubles | |
| /** | |
| * Indicates the view is enabled and has the focus. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is enabled and selected. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is enabled and that its window has focus. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is focused and selected. | |
| * | |
| * @see #FOCUSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| */ | |
| protected static final int[] FOCUSED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view has the focus and that its window has the focus. | |
| * | |
| * @see #FOCUSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is selected and that its window has the focus. | |
| * | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| // Triples | |
| /** | |
| * Indicates the view is enabled, focused and selected. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is enabled, focused and its window has the focus. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is enabled, selected and its window has the focus. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is focused, selected and its window has the focus. | |
| * | |
| * @see #FOCUSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is enabled, focused, selected and its window | |
| * has the focus. | |
| * | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed and its window has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed and selected. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, selected and its window has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed and focused. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, focused and its window has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, focused and selected. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, focused, selected and its window has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed and enabled. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled and its window has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled and selected. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled, selected and its window has the | |
| * focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled and focused. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled, focused and its window has the | |
| * focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled, focused and selected. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; | |
| /** | |
| * Indicates the view is pressed, enabled, focused, selected and its window | |
| * has the focus. | |
| * | |
| * @see #PRESSED_STATE_SET | |
| * @see #ENABLED_STATE_SET | |
| * @see #SELECTED_STATE_SET | |
| * @see #FOCUSED_STATE_SET | |
| * @see #WINDOW_FOCUSED_STATE_SET | |
| */ | |
| protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; | |
| static { | |
| EMPTY_STATE_SET = StateSet.get(0); | |
| WINDOW_FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_WINDOW_FOCUSED); | |
| SELECTED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_SELECTED); | |
| SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED); | |
| FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_FOCUSED); | |
| FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED); | |
| FOCUSED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED); | |
| FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_FOCUSED); | |
| ENABLED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_ENABLED); | |
| ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED); | |
| PRESSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_FOCUSED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED | |
| | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); | |
| PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( | |
| StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED | |
| | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED | |
| | StateSet.VIEW_STATE_PRESSED); | |
| } | |
| /** | |
| * Accessibility event types that are dispatched for text population. | |
| */ | |
| private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = | |
| AccessibilityEvent.TYPE_VIEW_CLICKED | |
| | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED | |
| | AccessibilityEvent.TYPE_VIEW_SELECTED | |
| | AccessibilityEvent.TYPE_VIEW_FOCUSED | |
| | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED | |
| | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER | |
| | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT | |
| | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED | |
| | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED | |
| | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED | |
| | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; | |
| /** | |
| * Temporary Rect currently for use in setBackground(). This will probably | |
| * be extended in the future to hold our own class with more than just | |
| * a Rect. :) | |
| */ | |
| static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); | |
| /** | |
| * Map used to store views' tags. | |
| */ | |
| private SparseArray<Object> mKeyedTags; | |
| /** | |
| * The next available accessibility id. | |
| */ | |
| private static int sNextAccessibilityViewId; | |
| /** | |
| * The animation currently associated with this view. | |
| * @hide | |
| */ | |
| protected Animation mCurrentAnimation = null; | |
| /** | |
| * Width as measured during measure pass. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement") | |
| int mMeasuredWidth; | |
| /** | |
| * Height as measured during measure pass. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement") | |
| int mMeasuredHeight; | |
| /** | |
| * Flag to indicate that this view was marked INVALIDATED, or had its display list | |
| * invalidated, prior to the current drawing iteration. If true, the view must re-draw | |
| * its display list. This flag, used only when hw accelerated, allows us to clear the | |
| * flag while retaining this information until it's needed (at getDisplayList() time and | |
| * in drawChild(), when we decide to draw a view's children's display lists into our own). | |
| * | |
| * {@hide} | |
| */ | |
| boolean mRecreateDisplayList = false; | |
| /** | |
| * The view's identifier. | |
| * {@hide} | |
| * | |
| * @see #setId(int) | |
| * @see #getId() | |
| */ | |
| @IdRes | |
| @ViewDebug.ExportedProperty(resolveId = true) | |
| int mID = NO_ID; | |
| /** | |
| * The stable ID of this view for accessibility purposes. | |
| */ | |
| int mAccessibilityViewId = NO_ID; | |
| private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; | |
| SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; | |
| /** | |
| * The view's tag. | |
| * {@hide} | |
| * | |
| * @see #setTag(Object) | |
| * @see #getTag() | |
| */ | |
| protected Object mTag = null; | |
| // for mPrivateFlags: | |
| /** {@hide} */ | |
| static final int PFLAG_WANTS_FOCUS = 0x00000001; | |
| /** {@hide} */ | |
| static final int PFLAG_FOCUSED = 0x00000002; | |
| /** {@hide} */ | |
| static final int PFLAG_SELECTED = 0x00000004; | |
| /** {@hide} */ | |
| static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; | |
| /** {@hide} */ | |
| static final int PFLAG_HAS_BOUNDS = 0x00000010; | |
| /** {@hide} */ | |
| static final int PFLAG_DRAWN = 0x00000020; | |
| /** | |
| * When this flag is set, this view is running an animation on behalf of its | |
| * children and should therefore not cancel invalidate requests, even if they | |
| * lie outside of this view's bounds. | |
| * | |
| * {@hide} | |
| */ | |
| static final int PFLAG_DRAW_ANIMATION = 0x00000040; | |
| /** {@hide} */ | |
| static final int PFLAG_SKIP_DRAW = 0x00000080; | |
| /** {@hide} */ | |
| static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; | |
| /** {@hide} */ | |
| static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; | |
| /** {@hide} */ | |
| static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; | |
| /** {@hide} */ | |
| static final int PFLAG_FORCE_LAYOUT = 0x00001000; | |
| /** {@hide} */ | |
| static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; | |
| private static final int PFLAG_PRESSED = 0x00004000; | |
| /** {@hide} */ | |
| static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; | |
| /** | |
| * Flag used to indicate that this view should be drawn once more (and only once | |
| * more) after its animation has completed. | |
| * {@hide} | |
| */ | |
| static final int PFLAG_ANIMATION_STARTED = 0x00010000; | |
| private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; | |
| /** | |
| * Indicates that the View returned true when onSetAlpha() was called and that | |
| * the alpha must be restored. | |
| * {@hide} | |
| */ | |
| static final int PFLAG_ALPHA_SET = 0x00040000; | |
| /** | |
| * Set by {@link #setScrollContainer(boolean)}. | |
| */ | |
| static final int PFLAG_SCROLL_CONTAINER = 0x00080000; | |
| /** | |
| * Set by {@link #setScrollContainer(boolean)}. | |
| */ | |
| static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; | |
| /** | |
| * View flag indicating whether this view was invalidated (fully or partially.) | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_DIRTY = 0x00200000; | |
| /** | |
| * View flag indicating whether this view was invalidated by an opaque | |
| * invalidate request. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_DIRTY_OPAQUE = 0x00400000; | |
| /** | |
| * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_DIRTY_MASK = 0x00600000; | |
| /** | |
| * Indicates whether the background is opaque. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; | |
| /** | |
| * Indicates whether the scrollbars are opaque. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; | |
| /** | |
| * Indicates whether the view is opaque. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_OPAQUE_MASK = 0x01800000; | |
| /** | |
| * Indicates a prepressed state; | |
| * the short time between ACTION_DOWN and recognizing | |
| * a 'real' press. Prepressed is used to recognize quick taps | |
| * even when they are shorter than ViewConfiguration.getTapTimeout(). | |
| * | |
| * @hide | |
| */ | |
| private static final int PFLAG_PREPRESSED = 0x02000000; | |
| /** | |
| * Indicates whether the view is temporarily detached. | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; | |
| /** | |
| * Indicates that we should awaken scroll bars once attached | |
| * | |
| * PLEASE NOTE: This flag is now unused as we now send onVisibilityChanged | |
| * during window attachment and it is no longer needed. Feel free to repurpose it. | |
| * | |
| * @hide | |
| */ | |
| private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; | |
| /** | |
| * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. | |
| * @hide | |
| */ | |
| private static final int PFLAG_HOVERED = 0x10000000; | |
| /** | |
| * no longer needed, should be reused | |
| */ | |
| private static final int PFLAG_DOES_NOTHING_REUSE_PLEASE = 0x20000000; | |
| /** {@hide} */ | |
| static final int PFLAG_ACTIVATED = 0x40000000; | |
| /** | |
| * Indicates that this view was specifically invalidated, not just dirtied because some | |
| * child view was invalidated. The flag is used to determine when we need to recreate | |
| * a view's display list (as opposed to just returning a reference to its existing | |
| * display list). | |
| * | |
| * @hide | |
| */ | |
| static final int PFLAG_INVALIDATED = 0x80000000; | |
| /** | |
| * Masks for mPrivateFlags2, as generated by dumpFlags(): | |
| * | |
| * |-------|-------|-------|-------| | |
| * 1 PFLAG2_DRAG_CAN_ACCEPT | |
| * 1 PFLAG2_DRAG_HOVERED | |
| * 11 PFLAG2_LAYOUT_DIRECTION_MASK | |
| * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL | |
| * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED | |
| * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK | |
| * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] | |
| * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] | |
| * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] | |
| * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] | |
| * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] | |
| * 11 PFLAG2_TEXT_DIRECTION_FLAGS[6] | |
| * 111 PFLAG2_TEXT_DIRECTION_FLAGS[7] | |
| * 111 PFLAG2_TEXT_DIRECTION_MASK | |
| * 1 PFLAG2_TEXT_DIRECTION_RESOLVED | |
| * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT | |
| * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK | |
| * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] | |
| * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] | |
| * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] | |
| * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] | |
| * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] | |
| * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] | |
| * 111 PFLAG2_TEXT_ALIGNMENT_MASK | |
| * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED | |
| * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT | |
| * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK | |
| * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK | |
| * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK | |
| * 1 PFLAG2_ACCESSIBILITY_FOCUSED | |
| * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED | |
| * 1 PFLAG2_VIEW_QUICK_REJECTED | |
| * 1 PFLAG2_PADDING_RESOLVED | |
| * 1 PFLAG2_DRAWABLE_RESOLVED | |
| * 1 PFLAG2_HAS_TRANSIENT_STATE | |
| * |-------|-------|-------|-------| | |
| */ | |
| /** | |
| * Indicates that this view has reported that it can accept the current drag's content. | |
| * Cleared when the drag operation concludes. | |
| * @hide | |
| */ | |
| static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; | |
| /** | |
| * Indicates that this view is currently directly under the drag location in a | |
| * drag-and-drop operation involving content that it can accept. Cleared when | |
| * the drag exits the view, or when the drag operation concludes. | |
| * @hide | |
| */ | |
| static final int PFLAG2_DRAG_HOVERED = 0x00000002; | |
| /** @hide */ | |
| @IntDef({ | |
| LAYOUT_DIRECTION_LTR, | |
| LAYOUT_DIRECTION_RTL, | |
| LAYOUT_DIRECTION_INHERIT, | |
| LAYOUT_DIRECTION_LOCALE | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection | |
| public @interface LayoutDir {} | |
| /** @hide */ | |
| @IntDef({ | |
| LAYOUT_DIRECTION_LTR, | |
| LAYOUT_DIRECTION_RTL | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface ResolvedLayoutDir {} | |
| /** | |
| * A flag to indicate that the layout direction of this view has not been defined yet. | |
| * @hide | |
| */ | |
| public static final int LAYOUT_DIRECTION_UNDEFINED = LayoutDirection.UNDEFINED; | |
| /** | |
| * Horizontal layout direction of this view is from Left to Right. | |
| * Use with {@link #setLayoutDirection}. | |
| */ | |
| public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; | |
| /** | |
| * Horizontal layout direction of this view is from Right to Left. | |
| * Use with {@link #setLayoutDirection}. | |
| */ | |
| public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; | |
| /** | |
| * Horizontal layout direction of this view is inherited from its parent. | |
| * Use with {@link #setLayoutDirection}. | |
| */ | |
| public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; | |
| /** | |
| * Horizontal layout direction of this view is from deduced from the default language | |
| * script for the locale. Use with {@link #setLayoutDirection}. | |
| */ | |
| public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; | |
| /** | |
| * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) | |
| * @hide | |
| */ | |
| static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; | |
| /** | |
| * Mask for use with private flags indicating bits used for horizontal layout direction. | |
| * @hide | |
| */ | |
| static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; | |
| /** | |
| * Indicates whether the view horizontal layout direction has been resolved and drawn to the | |
| * right-to-left direction. | |
| * @hide | |
| */ | |
| static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; | |
| /** | |
| * Indicates whether the view horizontal layout direction has been resolved. | |
| * @hide | |
| */ | |
| static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; | |
| /** | |
| * Mask for use with private flags indicating bits used for resolved horizontal layout direction. | |
| * @hide | |
| */ | |
| static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C | |
| << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; | |
| /* | |
| * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct | |
| * flag value. | |
| * @hide | |
| */ | |
| private static final int[] LAYOUT_DIRECTION_FLAGS = { | |
| LAYOUT_DIRECTION_LTR, | |
| LAYOUT_DIRECTION_RTL, | |
| LAYOUT_DIRECTION_INHERIT, | |
| LAYOUT_DIRECTION_LOCALE | |
| }; | |
| /** | |
| * Default horizontal layout direction. | |
| */ | |
| private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; | |
| /** | |
| * Default horizontal layout direction. | |
| * @hide | |
| */ | |
| static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; | |
| /** | |
| * Text direction is inherited through {@link ViewGroup} | |
| */ | |
| public static final int TEXT_DIRECTION_INHERIT = 0; | |
| /** | |
| * Text direction is using "first strong algorithm". The first strong directional character | |
| * determines the paragraph direction. If there is no strong directional character, the | |
| * paragraph direction is the view's resolved layout direction. | |
| */ | |
| public static final int TEXT_DIRECTION_FIRST_STRONG = 1; | |
| /** | |
| * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains | |
| * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. | |
| * If there are neither, the paragraph direction is the view's resolved layout direction. | |
| */ | |
| public static final int TEXT_DIRECTION_ANY_RTL = 2; | |
| /** | |
| * Text direction is forced to LTR. | |
| */ | |
| public static final int TEXT_DIRECTION_LTR = 3; | |
| /** | |
| * Text direction is forced to RTL. | |
| */ | |
| public static final int TEXT_DIRECTION_RTL = 4; | |
| /** | |
| * Text direction is coming from the system Locale. | |
| */ | |
| public static final int TEXT_DIRECTION_LOCALE = 5; | |
| /** | |
| * Text direction is using "first strong algorithm". The first strong directional character | |
| * determines the paragraph direction. If there is no strong directional character, the | |
| * paragraph direction is LTR. | |
| */ | |
| public static final int TEXT_DIRECTION_FIRST_STRONG_LTR = 6; | |
| /** | |
| * Text direction is using "first strong algorithm". The first strong directional character | |
| * determines the paragraph direction. If there is no strong directional character, the | |
| * paragraph direction is RTL. | |
| */ | |
| public static final int TEXT_DIRECTION_FIRST_STRONG_RTL = 7; | |
| /** | |
| * Default text direction is inherited | |
| */ | |
| private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; | |
| /** | |
| * Default resolved text direction | |
| * @hide | |
| */ | |
| static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; | |
| /** | |
| * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; | |
| /** | |
| * Mask for use with private flags indicating bits used for text direction. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 | |
| << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; | |
| /** | |
| * Array of text direction flags for mapping attribute "textDirection" to correct | |
| * flag value. | |
| * @hide | |
| */ | |
| private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { | |
| TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_FIRST_STRONG_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, | |
| TEXT_DIRECTION_FIRST_STRONG_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT | |
| }; | |
| /** | |
| * Indicates whether the view text direction has been resolved. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 | |
| << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; | |
| /** | |
| * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; | |
| /** | |
| * Mask for use with private flags indicating bits used for resolved text direction. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 | |
| << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; | |
| /** | |
| * Indicates whether the view text direction has been resolved to the "first strong" heuristic. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = | |
| TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; | |
| /** @hide */ | |
| @IntDef({ | |
| TEXT_ALIGNMENT_INHERIT, | |
| TEXT_ALIGNMENT_GRAVITY, | |
| TEXT_ALIGNMENT_CENTER, | |
| TEXT_ALIGNMENT_TEXT_START, | |
| TEXT_ALIGNMENT_TEXT_END, | |
| TEXT_ALIGNMENT_VIEW_START, | |
| TEXT_ALIGNMENT_VIEW_END | |
| }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface TextAlignment {} | |
| /** | |
| * Default text alignment. The text alignment of this View is inherited from its parent. | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_INHERIT = 0; | |
| /** | |
| * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, | |
| * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph’s text direction. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_GRAVITY = 1; | |
| /** | |
| * Align to the start of the paragraph, e.g. ALIGN_NORMAL. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_TEXT_START = 2; | |
| /** | |
| * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_TEXT_END = 3; | |
| /** | |
| * Center the paragraph, e.g. ALIGN_CENTER. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_CENTER = 4; | |
| /** | |
| * Align to the start of the view, which is ALIGN_LEFT if the view’s resolved | |
| * layoutDirection is LTR, and ALIGN_RIGHT otherwise. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_VIEW_START = 5; | |
| /** | |
| * Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved | |
| * layoutDirection is LTR, and ALIGN_LEFT otherwise. | |
| * | |
| * Use with {@link #setTextAlignment(int)} | |
| */ | |
| public static final int TEXT_ALIGNMENT_VIEW_END = 6; | |
| /** | |
| * Default text alignment is inherited | |
| */ | |
| private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; | |
| /** | |
| * Default resolved text alignment | |
| * @hide | |
| */ | |
| static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; | |
| /** | |
| * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; | |
| /** | |
| * Mask for use with private flags indicating bits used for text alignment. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; | |
| /** | |
| * Array of text direction flags for mapping attribute "textAlignment" to correct | |
| * flag value. | |
| * @hide | |
| */ | |
| private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { | |
| TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, | |
| TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT | |
| }; | |
| /** | |
| * Indicates whether the view text alignment has been resolved. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; | |
| /** | |
| * Bit shift to get the resolved text alignment. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; | |
| /** | |
| * Mask for use with private flags indicating bits used for text alignment. | |
| * @hide | |
| */ | |
| static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 | |
| << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; | |
| /** | |
| * Indicates whether if the view text alignment has been resolved to gravity | |
| */ | |
| private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = | |
| TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; | |
| // Accessiblity constants for mPrivateFlags2 | |
| /** | |
| * Shift for the bits in {@link #mPrivateFlags2} related to the | |
| * "importantForAccessibility" attribute. | |
| */ | |
| static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; | |
| /** | |
| * Automatically determine whether a view is important for accessibility. | |
| */ | |
| public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; | |
| /** | |
| * The view is important for accessibility. | |
| */ | |
| public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; | |
| /** | |
| * The view is not important for accessibility. | |
| */ | |
| public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; | |
| /** | |
| * The view is not important for accessibility, nor are any of its | |
| * descendant views. | |
| */ | |
| public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; | |
| /** | |
| * The default whether the view is important for accessibility. | |
| */ | |
| static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; | |
| /** | |
| * Mask for obtainig the bits which specify how to determine | |
| * whether a view is important for accessibility. | |
| */ | |
| static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO | |
| | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO | |
| | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) | |
| << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; | |
| /** | |
| * Shift for the bits in {@link #mPrivateFlags2} related to the | |
| * "accessibilityLiveRegion" attribute. | |
| */ | |
| static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; | |
| /** | |
| * Live region mode specifying that accessibility services should not | |
| * automatically announce changes to this view. This is the default live | |
| * region mode for most views. | |
| * <p> | |
| * Use with {@link #setAccessibilityLiveRegion(int)}. | |
| */ | |
| public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; | |
| /** | |
| * Live region mode specifying that accessibility services should announce | |
| * changes to this view. | |
| * <p> | |
| * Use with {@link #setAccessibilityLiveRegion(int)}. | |
| */ | |
| public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; | |
| /** | |
| * Live region mode specifying that accessibility services should interrupt | |
| * ongoing speech to immediately announce changes to this view. | |
| * <p> | |
| * Use with {@link #setAccessibilityLiveRegion(int)}. | |
| */ | |
| public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; | |
| /** | |
| * The default whether the view is important for accessibility. | |
| */ | |
| static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; | |
| /** | |
| * Mask for obtaining the bits which specify a view's accessibility live | |
| * region mode. | |
| */ | |
| static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE | |
| | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) | |
| << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; | |
| /** | |
| * Flag indicating whether a view has accessibility focus. | |
| */ | |
| static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; | |
| /** | |
| * Flag whether the accessibility state of the subtree rooted at this view changed. | |
| */ | |
| static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; | |
| /** | |
| * Flag indicating whether a view failed the quickReject() check in draw(). This condition | |
| * is used to check whether later changes to the view's transform should invalidate the | |
| * view to force the quickReject test to run again. | |
| */ | |
| static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; | |
| /** | |
| * Flag indicating that start/end padding has been resolved into left/right padding | |
| * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} | |
| * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved | |
| * during measurement. In some special cases this is required such as when an adapter-based | |
| * view measures prospective children without attaching them to a window. | |
| */ | |
| static final int PFLAG2_PADDING_RESOLVED = 0x20000000; | |
| /** | |
| * Flag indicating that the start/end drawables has been resolved into left/right ones. | |
| */ | |
| static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; | |
| /** | |
| * Indicates that the view is tracking some sort of transient state | |
| * that the app should not need to be aware of, but that the framework | |
| * should take special care to preserve. | |
| */ | |
| static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; | |
| /** | |
| * Group of bits indicating that RTL properties resolution is done. | |
| */ | |
| static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | | |
| PFLAG2_TEXT_DIRECTION_RESOLVED | | |
| PFLAG2_TEXT_ALIGNMENT_RESOLVED | | |
| PFLAG2_PADDING_RESOLVED | | |
| PFLAG2_DRAWABLE_RESOLVED; | |
| // There are a couple of flags left in mPrivateFlags2 | |
| /* End of masks for mPrivateFlags2 */ | |
| /** | |
| * Masks for mPrivateFlags3, as generated by dumpFlags(): | |
| * | |
| * |-------|-------|-------|-------| | |
| * 1 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM | |
| * 1 PFLAG3_VIEW_IS_ANIMATING_ALPHA | |
| * 1 PFLAG3_IS_LAID_OUT | |
| * 1 PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT | |
| * 1 PFLAG3_CALLED_SUPER | |
| * 1 PFLAG3_APPLYING_INSETS | |
| * 1 PFLAG3_FITTING_SYSTEM_WINDOWS | |
| * 1 PFLAG3_NESTED_SCROLLING_ENABLED | |
| * 1 PFLAG3_SCROLL_INDICATOR_TOP | |
| * 1 PFLAG3_SCROLL_INDICATOR_BOTTOM | |
| * 1 PFLAG3_SCROLL_INDICATOR_LEFT | |
| * 1 PFLAG3_SCROLL_INDICATOR_RIGHT | |
| * 1 PFLAG3_SCROLL_INDICATOR_START | |
| * 1 PFLAG3_SCROLL_INDICATOR_END | |
| * 1 PFLAG3_ASSIST_BLOCKED | |
| * |-------|-------|-------|-------| | |
| */ | |
| /** | |
| * Flag indicating that view has a transform animation set on it. This is used to track whether | |
| * an animation is cleared between successive frames, in order to tell the associated | |
| * DisplayList to clear its animation matrix. | |
| */ | |
| static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; | |
| /** | |
| * Flag indicating that view has an alpha animation set on it. This is used to track whether an | |
| * animation is cleared between successive frames, in order to tell the associated | |
| * DisplayList to restore its alpha value. | |
| */ | |
| static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; | |
| /** | |
| * Flag indicating that the view has been through at least one layout since it | |
| * was last attached to a window. | |
| */ | |
| static final int PFLAG3_IS_LAID_OUT = 0x4; | |
| /** | |
| * Flag indicating that a call to measure() was skipped and should be done | |
| * instead when layout() is invoked. | |
| */ | |
| static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; | |
| /** | |
| * Flag indicating that an overridden method correctly called down to | |
| * the superclass implementation as required by the API spec. | |
| */ | |
| static final int PFLAG3_CALLED_SUPER = 0x10; | |
| /** | |
| * Flag indicating that we're in the process of applying window insets. | |
| */ | |
| static final int PFLAG3_APPLYING_INSETS = 0x20; | |
| /** | |
| * Flag indicating that we're in the process of fitting system windows using the old method. | |
| */ | |
| static final int PFLAG3_FITTING_SYSTEM_WINDOWS = 0x40; | |
| /** | |
| * Flag indicating that nested scrolling is enabled for this view. | |
| * The view will optionally cooperate with views up its parent chain to allow for | |
| * integrated nested scrolling along the same axis. | |
| */ | |
| static final int PFLAG3_NESTED_SCROLLING_ENABLED = 0x80; | |
| /** | |
| * Flag indicating that the bottom scroll indicator should be displayed | |
| * when this view can scroll up. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_TOP = 0x0100; | |
| /** | |
| * Flag indicating that the bottom scroll indicator should be displayed | |
| * when this view can scroll down. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_BOTTOM = 0x0200; | |
| /** | |
| * Flag indicating that the left scroll indicator should be displayed | |
| * when this view can scroll left. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_LEFT = 0x0400; | |
| /** | |
| * Flag indicating that the right scroll indicator should be displayed | |
| * when this view can scroll right. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_RIGHT = 0x0800; | |
| /** | |
| * Flag indicating that the start scroll indicator should be displayed | |
| * when this view can scroll in the start direction. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_START = 0x1000; | |
| /** | |
| * Flag indicating that the end scroll indicator should be displayed | |
| * when this view can scroll in the end direction. | |
| */ | |
| static final int PFLAG3_SCROLL_INDICATOR_END = 0x2000; | |
| /* End of masks for mPrivateFlags3 */ | |
| static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; | |
| static final int SCROLL_INDICATORS_NONE = 0x0000; | |
| /** | |
| * Mask for use with setFlags indicating bits used for indicating which | |
| * scroll indicators are enabled. | |
| */ | |
| static final int SCROLL_INDICATORS_PFLAG3_MASK = PFLAG3_SCROLL_INDICATOR_TOP | |
| | PFLAG3_SCROLL_INDICATOR_BOTTOM | PFLAG3_SCROLL_INDICATOR_LEFT | |
| | PFLAG3_SCROLL_INDICATOR_RIGHT | PFLAG3_SCROLL_INDICATOR_START | |
| | PFLAG3_SCROLL_INDICATOR_END; | |
| /** | |
| * Left-shift required to translate between public scroll indicator flags | |
| * and internal PFLAGS3 flags. When used as a right-shift, translates | |
| * PFLAGS3 flags to public flags. | |
| */ | |
| static final int SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT = 8; | |
| /** @hide */ | |
| @Retention(RetentionPolicy.SOURCE) | |
| @IntDef(flag = true, | |
| value = { | |
| SCROLL_INDICATOR_TOP, | |
| SCROLL_INDICATOR_BOTTOM, | |
| SCROLL_INDICATOR_LEFT, | |
| SCROLL_INDICATOR_RIGHT, | |
| SCROLL_INDICATOR_START, | |
| SCROLL_INDICATOR_END, | |
| }) | |
| public @interface ScrollIndicators {} | |
| /** | |
| * Scroll indicator direction for the top edge of the view. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_TOP = | |
| PFLAG3_SCROLL_INDICATOR_TOP >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * Scroll indicator direction for the bottom edge of the view. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_BOTTOM = | |
| PFLAG3_SCROLL_INDICATOR_BOTTOM >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * Scroll indicator direction for the left edge of the view. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_LEFT = | |
| PFLAG3_SCROLL_INDICATOR_LEFT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * Scroll indicator direction for the right edge of the view. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_RIGHT = | |
| PFLAG3_SCROLL_INDICATOR_RIGHT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * Scroll indicator direction for the starting edge of the view. | |
| * <p> | |
| * Resolved according to the view's layout direction, see | |
| * {@link #getLayoutDirection()} for more information. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_START = | |
| PFLAG3_SCROLL_INDICATOR_START >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * Scroll indicator direction for the ending edge of the view. | |
| * <p> | |
| * Resolved according to the view's layout direction, see | |
| * {@link #getLayoutDirection()} for more information. | |
| * | |
| * @see #setScrollIndicators(int) | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| */ | |
| public static final int SCROLL_INDICATOR_END = | |
| PFLAG3_SCROLL_INDICATOR_END >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| /** | |
| * <p>Indicates that we are allowing {@link ViewStructure} to traverse | |
| * into this view.<p> | |
| */ | |
| static final int PFLAG3_ASSIST_BLOCKED = 0x4000; | |
| /** | |
| * Always allow a user to over-scroll this view, provided it is a | |
| * view that can scroll. | |
| * | |
| * @see #getOverScrollMode() | |
| * @see #setOverScrollMode(int) | |
| */ | |
| public static final int OVER_SCROLL_ALWAYS = 0; | |
| /** | |
| * Allow a user to over-scroll this view only if the content is large | |
| * enough to meaningfully scroll, provided it is a view that can scroll. | |
| * | |
| * @see #getOverScrollMode() | |
| * @see #setOverScrollMode(int) | |
| */ | |
| public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; | |
| /** | |
| * Never allow a user to over-scroll this view. | |
| * | |
| * @see #getOverScrollMode() | |
| * @see #setOverScrollMode(int) | |
| */ | |
| public static final int OVER_SCROLL_NEVER = 2; | |
| /** | |
| * Special constant for {@link #setSystemUiVisibility(int)}: View has | |
| * requested the system UI (status bar) to be visible (the default). | |
| * | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| public static final int SYSTEM_UI_FLAG_VISIBLE = 0; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View has requested the | |
| * system UI to enter an unobtrusive "low profile" mode. | |
| * | |
| * <p>This is for use in games, book readers, video players, or any other | |
| * "immersive" application where the usual system chrome is deemed too distracting. | |
| * | |
| * <p>In low profile mode, the status bar and/or navigation icons may dim. | |
| * | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the | |
| * system navigation be temporarily hidden. | |
| * | |
| * <p>This is an even less obtrusive state than that called for by | |
| * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls | |
| * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause | |
| * those to disappear. This is useful (in conjunction with the | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} | |
| * window flags) for displaying content using every last pixel on the display. | |
| * | |
| * <p>There is a limitation: because navigation controls are so important, the least user | |
| * interaction will cause them to reappear immediately. When this happens, both | |
| * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, | |
| * so that both elements reappear at the same time. | |
| * | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go | |
| * into the normal fullscreen mode so that its content can take over the screen | |
| * while still allowing the user to interact with the application. | |
| * | |
| * <p>This has the same visual effect as | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN | |
| * WindowManager.LayoutParams.FLAG_FULLSCREEN}, | |
| * meaning that non-critical screen decorations (such as the status bar) will be | |
| * hidden while the user is in the View's window, focusing the experience on | |
| * that content. Unlike the window flag, if you are using ActionBar in | |
| * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY | |
| * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also | |
| * hide the action bar. | |
| * | |
| * <p>This approach to going fullscreen is best used over the window flag when | |
| * it is a transient state -- that is, the application does this at certain | |
| * points in its user interaction where it wants to allow the user to focus | |
| * on content, but not as a continuous state. For situations where the application | |
| * would like to simply stay full screen the entire time (such as a game that | |
| * wants to take over the screen), the | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} | |
| * is usually a better approach. The state set here will be removed by the system | |
| * in various situations (such as the user moving to another application) like | |
| * the other system UI states. | |
| * | |
| * <p>When using this flag, the application should provide some easy facility | |
| * for the user to go out of it. A common example would be in an e-book | |
| * reader, where tapping on the screen brings back whatever screen and UI | |
| * decorations that had been hidden while the user was immersed in reading | |
| * the book. | |
| * | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: When using other layout | |
| * flags, we would like a stable view of the content insets given to | |
| * {@link #fitSystemWindows(Rect)}. This means that the insets seen there | |
| * will always represent the worst case that the application can expect | |
| * as a continuous state. In the stock Android UI this is the space for | |
| * the system bar, nav bar, and status bar, but not more transient elements | |
| * such as an input method. | |
| * | |
| * The stable layout your UI sees is based on the system UI modes you can | |
| * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} | |
| * then you will get a stable layout for changes of the | |
| * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition | |
| * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} | |
| * with a stable layout. (Note that you should avoid using | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) | |
| * | |
| * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} | |
| * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), | |
| * then a hidden status bar will be considered a "stable" state for purposes | |
| * here. This allows your UI to continually hide the status bar, while still | |
| * using the system UI flags to hide the action bar while still retaining | |
| * a stable layout. Note that changing the window fullscreen flag will never | |
| * provide a stable layout for a clean transition. | |
| * | |
| * <p>If you are using ActionBar in | |
| * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY | |
| * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the | |
| * insets it adds to those given to the application. | |
| */ | |
| public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View would like its window | |
| * to be laid out as if it has requested | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This | |
| * allows it to avoid artifacts when switching in and out of that mode, at | |
| * the expense that some of its user interface may be covered by screen | |
| * decorations when they are shown. You can perform layout of your inner | |
| * UI elements to account for the navigation system UI through the | |
| * {@link #fitSystemWindows(Rect)} method. | |
| */ | |
| public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View would like its window | |
| * to be laid out as if it has requested | |
| * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This | |
| * allows it to avoid artifacts when switching in and out of that mode, at | |
| * the expense that some of its user interface may be covered by screen | |
| * decorations when they are shown. You can perform layout of your inner | |
| * UI elements to account for non-fullscreen system UI through the | |
| * {@link #fitSystemWindows(Rect)} method. | |
| */ | |
| public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when | |
| * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is | |
| * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any | |
| * user interaction. | |
| * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only | |
| * has an effect when used in combination with that flag.</p> | |
| */ | |
| public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when | |
| * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation | |
| * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive | |
| * experience while also hiding the system bars. If this flag is not set, | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user | |
| * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system | |
| * if the user swipes from the top of the screen. | |
| * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with | |
| * system gestures, such as swiping from the top of the screen. These transient system bars | |
| * will overlay app’s content, may have some degree of transparency, and will automatically | |
| * hide after a short timeout. | |
| * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination | |
| * with one or both of those flags.</p> | |
| */ | |
| public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; | |
| /** | |
| * Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that | |
| * is compatible with light status bar backgrounds. | |
| * | |
| * <p>For this to take effect, the window must request | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS | |
| * FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS} but not | |
| * {@link android.view.WindowManager.LayoutParams#FLAG_TRANSLUCENT_STATUS | |
| * FLAG_TRANSLUCENT_STATUS}. | |
| * | |
| * @see android.R.attr#windowLightStatusBar | |
| */ | |
| public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000; | |
| /** | |
| * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. | |
| */ | |
| public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; | |
| /** | |
| * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. | |
| */ | |
| public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to make the status bar not expandable. Unless you also | |
| * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide notification icons and scrolling ticker text. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to disable incoming notification alerts. This will not block | |
| * icons, but it will block sound, vibrating and other visual or aural notifications. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide only the scrolling ticker. Note that | |
| * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies | |
| * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide the center system info area. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide only the home button. Don't use this | |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). | |
| */ | |
| public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide only the back button. Don't use this | |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). | |
| */ | |
| public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide only the clock. You might use this if your activity has | |
| * its own clock making the status bar's clock redundant. | |
| */ | |
| public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to hide only the recent apps button. Don't use this | |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). | |
| */ | |
| public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to disable the global search gesture. Don't use this | |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). | |
| */ | |
| public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the status bar is displayed in transient mode. | |
| */ | |
| public static final int STATUS_BAR_TRANSIENT = 0x04000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the navigation bar is displayed in transient mode. | |
| */ | |
| public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the hidden status bar would like to be shown. | |
| */ | |
| public static final int STATUS_BAR_UNHIDE = 0x10000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the hidden navigation bar would like to be shown. | |
| */ | |
| public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the status bar is displayed in translucent mode. | |
| */ | |
| public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; | |
| /** | |
| * @hide | |
| * | |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked | |
| * out of the public fields to keep the undefined bits out of the developer's way. | |
| * | |
| * Flag to specify that the navigation bar is displayed in translucent mode. | |
| */ | |
| public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; | |
| /** | |
| * @hide | |
| * | |
| * Whether Recents is visible or not. | |
| */ | |
| public static final int RECENT_APPS_VISIBLE = 0x00004000; | |
| /** | |
| * @hide | |
| * | |
| * Makes system ui transparent. | |
| */ | |
| public static final int SYSTEM_UI_TRANSPARENT = 0x00008000; | |
| /** | |
| * @hide | |
| */ | |
| public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x00003FFF; | |
| /** | |
| * These are the system UI flags that can be cleared by events outside | |
| * of an application. Currently this is just the ability to tap on the | |
| * screen while hiding the navigation bar to have it return. | |
| * @hide | |
| */ | |
| public static final int SYSTEM_UI_CLEARABLE_FLAGS = | |
| SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION | |
| | SYSTEM_UI_FLAG_FULLSCREEN; | |
| /** | |
| * Flags that can impact the layout in relation to system UI. | |
| */ | |
| public static final int SYSTEM_UI_LAYOUT_FLAGS = | |
| SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | |
| | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; | |
| /** @hide */ | |
| @IntDef(flag = true, | |
| value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) | |
| @Retention(RetentionPolicy.SOURCE) | |
| public @interface FindViewFlags {} | |
| /** | |
| * Find views that render the specified text. | |
| * | |
| * @see #findViewsWithText(ArrayList, CharSequence, int) | |
| */ | |
| public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; | |
| /** | |
| * Find find views that contain the specified content description. | |
| * | |
| * @see #findViewsWithText(ArrayList, CharSequence, int) | |
| */ | |
| public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; | |
| /** | |
| * Find views that contain {@link AccessibilityNodeProvider}. Such | |
| * a View is a root of virtual view hierarchy and may contain the searched | |
| * text. If this flag is set Views with providers are automatically | |
| * added and it is a responsibility of the client to call the APIs of | |
| * the provider to determine whether the virtual tree rooted at this View | |
| * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s | |
| * representing the virtual views with this text. | |
| * | |
| * @see #findViewsWithText(ArrayList, CharSequence, int) | |
| * | |
| * @hide | |
| */ | |
| public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; | |
| /** | |
| * The undefined cursor position. | |
| * | |
| * @hide | |
| */ | |
| public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; | |
| /** | |
| * Indicates that the screen has changed state and is now off. | |
| * | |
| * @see #onScreenStateChanged(int) | |
| */ | |
| public static final int SCREEN_STATE_OFF = 0x0; | |
| /** | |
| * Indicates that the screen has changed state and is now on. | |
| * | |
| * @see #onScreenStateChanged(int) | |
| */ | |
| public static final int SCREEN_STATE_ON = 0x1; | |
| /** | |
| * Indicates no axis of view scrolling. | |
| */ | |
| public static final int SCROLL_AXIS_NONE = 0; | |
| /** | |
| * Indicates scrolling along the horizontal axis. | |
| */ | |
| public static final int SCROLL_AXIS_HORIZONTAL = 1 << 0; | |
| /** | |
| * Indicates scrolling along the vertical axis. | |
| */ | |
| public static final int SCROLL_AXIS_VERTICAL = 1 << 1; | |
| /** | |
| * Controls the over-scroll mode for this view. | |
| * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, | |
| * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, | |
| * and {@link #OVER_SCROLL_NEVER}. | |
| */ | |
| private int mOverScrollMode; | |
| /** | |
| * The parent this view is attached to. | |
| * {@hide} | |
| * | |
| * @see #getParent() | |
| */ | |
| protected ViewParent mParent; | |
| /** | |
| * {@hide} | |
| */ | |
| AttachInfo mAttachInfo; | |
| /** | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(flagMapping = { | |
| @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, | |
| name = "FORCE_LAYOUT"), | |
| @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, | |
| name = "LAYOUT_REQUIRED"), | |
| @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, | |
| name = "DRAWING_CACHE_INVALID", outputIf = false), | |
| @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), | |
| @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), | |
| @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), | |
| @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") | |
| }, formatToHexString = true) | |
| int mPrivateFlags; | |
| int mPrivateFlags2; | |
| int mPrivateFlags3; | |
| /** | |
| * This view's request for the visibility of the status bar. | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(flagMapping = { | |
| @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, | |
| equals = SYSTEM_UI_FLAG_LOW_PROFILE, | |
| name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), | |
| @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, | |
| equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, | |
| name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), | |
| @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, | |
| equals = SYSTEM_UI_FLAG_VISIBLE, | |
| name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) | |
| }, formatToHexString = true) | |
| int mSystemUiVisibility; | |
| /** | |
| * Reference count for transient state. | |
| * @see #setHasTransientState(boolean) | |
| */ | |
| int mTransientStateCount = 0; | |
| /** | |
| * Count of how many windows this view has been attached to. | |
| */ | |
| int mWindowAttachCount; | |
| /** | |
| * The layout parameters associated with this view and used by the parent | |
| * {@link android.view.ViewGroup} to determine how this view should be | |
| * laid out. | |
| * {@hide} | |
| */ | |
| protected ViewGroup.LayoutParams mLayoutParams; | |
| /** | |
| * The view flags hold various views states. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(formatToHexString = true) | |
| int mViewFlags; | |
| static class TransformationInfo { | |
| /** | |
| * The transform matrix for the View. This transform is calculated internally | |
| * based on the translation, rotation, and scale properties. | |
| * | |
| * Do *not* use this variable directly; instead call getMatrix(), which will | |
| * load the value from the View's RenderNode. | |
| */ | |
| private final Matrix mMatrix = new Matrix(); | |
| /** | |
| * The inverse transform matrix for the View. This transform is calculated | |
| * internally based on the translation, rotation, and scale properties. | |
| * | |
| * Do *not* use this variable directly; instead call getInverseMatrix(), | |
| * which will load the value from the View's RenderNode. | |
| */ | |
| private Matrix mInverseMatrix; | |
| /** | |
| * The opacity of the View. This is a value from 0 to 1, where 0 means | |
| * completely transparent and 1 means completely opaque. | |
| */ | |
| @ViewDebug.ExportedProperty | |
| float mAlpha = 1f; | |
| /** | |
| * The opacity of the view as manipulated by the Fade transition. This is a hidden | |
| * property only used by transitions, which is composited with the other alpha | |
| * values to calculate the final visual alpha value. | |
| */ | |
| float mTransitionAlpha = 1f; | |
| } | |
| TransformationInfo mTransformationInfo; | |
| /** | |
| * Current clip bounds. to which all drawing of this view are constrained. | |
| */ | |
| Rect mClipBounds = null; | |
| private boolean mLastIsOpaque; | |
| /** | |
| * The distance in pixels from the left edge of this view's parent | |
| * to the left edge of this view. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| protected int mLeft; | |
| /** | |
| * The distance in pixels from the left edge of this view's parent | |
| * to the right edge of this view. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| protected int mRight; | |
| /** | |
| * The distance in pixels from the top edge of this view's parent | |
| * to the top edge of this view. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| protected int mTop; | |
| /** | |
| * The distance in pixels from the top edge of this view's parent | |
| * to the bottom edge of this view. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| protected int mBottom; | |
| /** | |
| * The offset, in pixels, by which the content of this view is scrolled | |
| * horizontally. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "scrolling") | |
| protected int mScrollX; | |
| /** | |
| * The offset, in pixels, by which the content of this view is scrolled | |
| * vertically. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "scrolling") | |
| protected int mScrollY; | |
| /** | |
| * The left padding in pixels, that is the distance in pixels between the | |
| * left edge of this view and the left edge of its content. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mPaddingLeft = 0; | |
| /** | |
| * The right padding in pixels, that is the distance in pixels between the | |
| * right edge of this view and the right edge of its content. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mPaddingRight = 0; | |
| /** | |
| * The top padding in pixels, that is the distance in pixels between the | |
| * top edge of this view and the top edge of its content. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mPaddingTop; | |
| /** | |
| * The bottom padding in pixels, that is the distance in pixels between the | |
| * bottom edge of this view and the bottom edge of its content. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mPaddingBottom; | |
| /** | |
| * The layout insets in pixels, that is the distance in pixels between the | |
| * visible edges of this view its bounds. | |
| */ | |
| private Insets mLayoutInsets; | |
| /** | |
| * Briefly describes the view and is primarily used for accessibility support. | |
| */ | |
| private CharSequence mContentDescription; | |
| /** | |
| * Specifies the id of a view for which this view serves as a label for | |
| * accessibility purposes. | |
| */ | |
| private int mLabelForId = View.NO_ID; | |
| /** | |
| * Predicate for matching labeled view id with its label for | |
| * accessibility purposes. | |
| */ | |
| private MatchLabelForPredicate mMatchLabelForPredicate; | |
| /** | |
| * Specifies a view before which this one is visited in accessibility traversal. | |
| */ | |
| private int mAccessibilityTraversalBeforeId = NO_ID; | |
| /** | |
| * Specifies a view after which this one is visited in accessibility traversal. | |
| */ | |
| private int mAccessibilityTraversalAfterId = NO_ID; | |
| /** | |
| * Predicate for matching a view by its id. | |
| */ | |
| private MatchIdPredicate mMatchIdPredicate; | |
| /** | |
| * Cache the paddingRight set by the user to append to the scrollbar's size. | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mUserPaddingRight; | |
| /** | |
| * Cache the paddingBottom set by the user to append to the scrollbar's size. | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mUserPaddingBottom; | |
| /** | |
| * Cache the paddingLeft set by the user to append to the scrollbar's size. | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| protected int mUserPaddingLeft; | |
| /** | |
| * Cache the paddingStart set by the user to append to the scrollbar's size. | |
| * | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| int mUserPaddingStart; | |
| /** | |
| * Cache the paddingEnd set by the user to append to the scrollbar's size. | |
| * | |
| */ | |
| @ViewDebug.ExportedProperty(category = "padding") | |
| int mUserPaddingEnd; | |
| /** | |
| * Cache initial left padding. | |
| * | |
| * @hide | |
| */ | |
| int mUserPaddingLeftInitial; | |
| /** | |
| * Cache initial right padding. | |
| * | |
| * @hide | |
| */ | |
| int mUserPaddingRightInitial; | |
| /** | |
| * Default undefined padding | |
| */ | |
| private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; | |
| /** | |
| * Cache if a left padding has been defined | |
| */ | |
| private boolean mLeftPaddingDefined = false; | |
| /** | |
| * Cache if a right padding has been defined | |
| */ | |
| private boolean mRightPaddingDefined = false; | |
| /** | |
| * @hide | |
| */ | |
| int mOldWidthMeasureSpec = Integer.MIN_VALUE; | |
| /** | |
| * @hide | |
| */ | |
| int mOldHeightMeasureSpec = Integer.MIN_VALUE; | |
| private LongSparseLongArray mMeasureCache; | |
| @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") | |
| private Drawable mBackground; | |
| private TintInfo mBackgroundTint; | |
| @ViewDebug.ExportedProperty(deepExport = true, prefix = "fg_") | |
| private ForegroundInfo mForegroundInfo; | |
| private Drawable mScrollIndicatorDrawable; | |
| /** | |
| * RenderNode used for backgrounds. | |
| * <p> | |
| * When non-null and valid, this is expected to contain an up-to-date copy | |
| * of the background drawable. It is cleared on temporary detach, and reset | |
| * on cleanup. | |
| */ | |
| private RenderNode mBackgroundRenderNode; | |
| private int mBackgroundResource; | |
| private boolean mBackgroundSizeChanged; | |
| private String mTransitionName; | |
| static class TintInfo { | |
| ColorStateList mTintList; | |
| PorterDuff.Mode mTintMode; | |
| boolean mHasTintMode; | |
| boolean mHasTintList; | |
| } | |
| private static class ForegroundInfo { | |
| private Drawable mDrawable; | |
| private TintInfo mTintInfo; | |
| private int mGravity = Gravity.FILL; | |
| private boolean mInsidePadding = true; | |
| private boolean mBoundsChanged = true; | |
| private final Rect mSelfBounds = new Rect(); | |
| private final Rect mOverlayBounds = new Rect(); | |
| } | |
| static class ListenerInfo { | |
| /** | |
| * Listener used to dispatch focus change events. | |
| * This field should be made private, so it is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| protected OnFocusChangeListener mOnFocusChangeListener; | |
| /** | |
| * Listeners for layout change events. | |
| */ | |
| private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; | |
| protected OnScrollChangeListener mOnScrollChangeListener; | |
| /** | |
| * Listeners for attach events. | |
| */ | |
| private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; | |
| /** | |
| * Listener used to dispatch click events. | |
| * This field should be made private, so it is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| public OnClickListener mOnClickListener; | |
| /** | |
| * Listener used to dispatch long click events. | |
| * This field should be made private, so it is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| protected OnLongClickListener mOnLongClickListener; | |
| /** | |
| * Listener used to dispatch context click events. This field should be made private, so it | |
| * is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| protected OnContextClickListener mOnContextClickListener; | |
| /** | |
| * Listener used to build the context menu. | |
| * This field should be made private, so it is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| protected OnCreateContextMenuListener mOnCreateContextMenuListener; | |
| private OnKeyListener mOnKeyListener; | |
| private OnTouchListener mOnTouchListener; | |
| private OnHoverListener mOnHoverListener; | |
| private OnGenericMotionListener mOnGenericMotionListener; | |
| private OnDragListener mOnDragListener; | |
| private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; | |
| OnApplyWindowInsetsListener mOnApplyWindowInsetsListener; | |
| } | |
| ListenerInfo mListenerInfo; | |
| /** | |
| * The application environment this view lives in. | |
| * This field should be made private, so it is hidden from the SDK. | |
| * {@hide} | |
| */ | |
| @ViewDebug.ExportedProperty(deepExport = true) | |
| protected Context mContext; | |
| private final Resources mResources; | |
| private ScrollabilityCache mScrollCache; | |
| private int[] mDrawableState = null; | |
| ViewOutlineProvider mOutlineProvider = ViewOutlineProvider.BACKGROUND; | |
| /** | |
| * Animator that automatically runs based on state changes. | |
| */ | |
| private StateListAnimator mStateListAnimator; | |
| /** | |
| * When this view has focus and the next focus is {@link #FOCUS_LEFT}, | |
| * the user may specify which view to go to next. | |
| */ | |
| private int mNextFocusLeftId = View.NO_ID; | |
| /** | |
| * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, | |
| * the user may specify which view to go to next. | |
| */ | |
| private int mNextFocusRightId = View.NO_ID; | |
| /** | |
| * When this view has focus and the next focus is {@link #FOCUS_UP}, | |
| * the user may specify which view to go to next. | |
| */ | |
| private int mNextFocusUpId = View.NO_ID; | |
| /** | |
| * When this view has focus and the next focus is {@link #FOCUS_DOWN}, | |
| * the user may specify which view to go to next. | |
| */ | |
| private int mNextFocusDownId = View.NO_ID; | |
| /** | |
| * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, | |
| * the user may specify which view to go to next. | |
| */ | |
| int mNextFocusForwardId = View.NO_ID; | |
| private CheckForLongPress mPendingCheckForLongPress; | |
| private CheckForTap mPendingCheckForTap = null; | |
| private PerformClick mPerformClick; | |
| private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; | |
| private UnsetPressedState mUnsetPressedState; | |
| /** | |
| * Whether the long press's action has been invoked. The tap's action is invoked on the | |
| * up event while a long press is invoked as soon as the long press duration is reached, so | |
| * a long press could be performed before the tap is checked, in which case the tap's action | |
| * should not be invoked. | |
| */ | |
| private boolean mHasPerformedLongPress; | |
| /** | |
| * Whether a context click button is currently pressed down. This is true when the stylus is | |
| * touching the screen and the primary button has been pressed, or if a mouse's right button is | |
| * pressed. This is false once the button is released or if the stylus has been lifted. | |
| */ | |
| private boolean mInContextButtonPress; | |
| /** | |
| * Whether the next up event should be ignored for the purposes of gesture recognition. This is | |
| * true after a stylus button press has occured, when the next up event should not be recognized | |
| * as a tap. | |
| */ | |
| private boolean mIgnoreNextUpEvent; | |
| /** | |
| * The minimum height of the view. We'll try our best to have the height | |
| * of this view to at least this amount. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement") | |
| private int mMinHeight; | |
| /** | |
| * The minimum width of the view. We'll try our best to have the width | |
| * of this view to at least this amount. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement") | |
| private int mMinWidth; | |
| /** | |
| * The delegate to handle touch events that are physically in this view | |
| * but should be handled by another view. | |
| */ | |
| private TouchDelegate mTouchDelegate = null; | |
| /** | |
| * Solid color to use as a background when creating the drawing cache. Enables | |
| * the cache to use 16 bit bitmaps instead of 32 bit. | |
| */ | |
| private int mDrawingCacheBackgroundColor = 0; | |
| /** | |
| * Special tree observer used when mAttachInfo is null. | |
| */ | |
| private ViewTreeObserver mFloatingTreeObserver; | |
| /** | |
| * Cache the touch slop from the context that created the view. | |
| */ | |
| private int mTouchSlop; | |
| /** | |
| * Object that handles automatic animation of view properties. | |
| */ | |
| private ViewPropertyAnimator mAnimator = null; | |
| /** | |
| * Flag indicating that a drag can cross window boundaries. When | |
| * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called | |
| * with this flag set, all visible applications will be able to participate | |
| * in the drag operation and receive the dragged content. | |
| * | |
| * @hide | |
| */ | |
| public static final int DRAG_FLAG_GLOBAL = 1; | |
| /** | |
| * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. | |
| */ | |
| private float mVerticalScrollFactor; | |
| /** | |
| * Position of the vertical scroll bar. | |
| */ | |
| private int mVerticalScrollbarPosition; | |
| /** | |
| * Position the scroll bar at the default position as determined by the system. | |
| */ | |
| public static final int SCROLLBAR_POSITION_DEFAULT = 0; | |
| /** | |
| * Position the scroll bar along the left edge. | |
| */ | |
| public static final int SCROLLBAR_POSITION_LEFT = 1; | |
| /** | |
| * Position the scroll bar along the right edge. | |
| */ | |
| public static final int SCROLLBAR_POSITION_RIGHT = 2; | |
| /** | |
| * Indicates that the view does not have a layer. | |
| * | |
| * @see #getLayerType() | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| * @see #LAYER_TYPE_SOFTWARE | |
| * @see #LAYER_TYPE_HARDWARE | |
| */ | |
| public static final int LAYER_TYPE_NONE = 0; | |
| /** | |
| * <p>Indicates that the view has a software layer. A software layer is backed | |
| * by a bitmap and causes the view to be rendered using Android's software | |
| * rendering pipeline, even if hardware acceleration is enabled.</p> | |
| * | |
| * <p>Software layers have various usages:</p> | |
| * <p>When the application is not using hardware acceleration, a software layer | |
| * is useful to apply a specific color filter and/or blending mode and/or | |
| * translucency to a view and all its children.</p> | |
| * <p>When the application is using hardware acceleration, a software layer | |
| * is useful to render drawing primitives not supported by the hardware | |
| * accelerated pipeline. It can also be used to cache a complex view tree | |
| * into a texture and reduce the complexity of drawing operations. For instance, | |
| * when animating a complex view tree with a translation, a software layer can | |
| * be used to render the view tree only once.</p> | |
| * <p>Software layers should be avoided when the affected view tree updates | |
| * often. Every update will require to re-render the software layer, which can | |
| * potentially be slow (particularly when hardware acceleration is turned on | |
| * since the layer will have to be uploaded into a hardware texture after every | |
| * update.)</p> | |
| * | |
| * @see #getLayerType() | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| * @see #LAYER_TYPE_NONE | |
| * @see #LAYER_TYPE_HARDWARE | |
| */ | |
| public static final int LAYER_TYPE_SOFTWARE = 1; | |
| /** | |
| * <p>Indicates that the view has a hardware layer. A hardware layer is backed | |
| * by a hardware specific texture (generally Frame Buffer Objects or FBO on | |
| * OpenGL hardware) and causes the view to be rendered using Android's hardware | |
| * rendering pipeline, but only if hardware acceleration is turned on for the | |
| * view hierarchy. When hardware acceleration is turned off, hardware layers | |
| * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> | |
| * | |
| * <p>A hardware layer is useful to apply a specific color filter and/or | |
| * blending mode and/or translucency to a view and all its children.</p> | |
| * <p>A hardware layer can be used to cache a complex view tree into a | |
| * texture and reduce the complexity of drawing operations. For instance, | |
| * when animating a complex view tree with a translation, a hardware layer can | |
| * be used to render the view tree only once.</p> | |
| * <p>A hardware layer can also be used to increase the rendering quality when | |
| * rotation transformations are applied on a view. It can also be used to | |
| * prevent potential clipping issues when applying 3D transforms on a view.</p> | |
| * | |
| * @see #getLayerType() | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| * @see #LAYER_TYPE_NONE | |
| * @see #LAYER_TYPE_SOFTWARE | |
| */ | |
| public static final int LAYER_TYPE_HARDWARE = 2; | |
| @ViewDebug.ExportedProperty(category = "drawing", mapping = { | |
| @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), | |
| @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), | |
| @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") | |
| }) | |
| int mLayerType = LAYER_TYPE_NONE; | |
| Paint mLayerPaint; | |
| /** | |
| * Set to true when drawing cache is enabled and cannot be created. | |
| * | |
| * @hide | |
| */ | |
| public boolean mCachingFailed; | |
| private Bitmap mDrawingCache; | |
| private Bitmap mUnscaledDrawingCache; | |
| /** | |
| * RenderNode holding View properties, potentially holding a DisplayList of View content. | |
| * <p> | |
| * When non-null and valid, this is expected to contain an up-to-date copy | |
| * of the View content. Its DisplayList content is cleared on temporary detach and reset on | |
| * cleanup. | |
| */ | |
| final RenderNode mRenderNode; | |
| /** | |
| * Set to true when the view is sending hover accessibility events because it | |
| * is the innermost hovered view. | |
| */ | |
| private boolean mSendingHoverAccessibilityEvents; | |
| /** | |
| * Delegate for injecting accessibility functionality. | |
| */ | |
| AccessibilityDelegate mAccessibilityDelegate; | |
| /** | |
| * The view's overlay layer. Developers get a reference to the overlay via getOverlay() | |
| * and add/remove objects to/from the overlay directly through the Overlay methods. | |
| */ | |
| ViewOverlay mOverlay; | |
| /** | |
| * The currently active parent view for receiving delegated nested scrolling events. | |
| * This is set by {@link #startNestedScroll(int)} during a touch interaction and cleared | |
| * by {@link #stopNestedScroll()} at the same point where we clear | |
| * requestDisallowInterceptTouchEvent. | |
| */ | |
| private ViewParent mNestedScrollingParent; | |
| /** | |
| * Consistency verifier for debugging purposes. | |
| * @hide | |
| */ | |
| protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = | |
| InputEventConsistencyVerifier.isInstrumentationEnabled() ? | |
| new InputEventConsistencyVerifier(this, 0) : null; | |
| private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); | |
| private int[] mTempNestedScrollConsumed; | |
| /** | |
| * An overlay is going to draw this View instead of being drawn as part of this | |
| * View's parent. mGhostView is the View in the Overlay that must be invalidated | |
| * when this view is invalidated. | |
| */ | |
| GhostView mGhostView; | |
| /** | |
| * Holds pairs of adjacent attribute data: attribute name followed by its value. | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "attributes", hasAdjacentMapping = true) | |
| public String[] mAttributes; | |
| /** | |
| * Maps a Resource id to its name. | |
| */ | |
| private static SparseArray<String> mAttributeMap; | |
| /** | |
| * @hide | |
| */ | |
| String mStartActivityRequestWho; | |
| /** | |
| * Simple constructor to use when creating a view from code. | |
| * | |
| * @param context The Context the view is running in, through which it can | |
| * access the current theme, resources, etc. | |
| */ | |
| public View(Context context) { | |
| mContext = context; | |
| mResources = context != null ? context.getResources() : null; | |
| mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; | |
| // Set some flags defaults | |
| mPrivateFlags2 = | |
| (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | | |
| (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | | |
| (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | | |
| (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | | |
| (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | | |
| (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); | |
| mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); | |
| setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); | |
| mUserPaddingStart = UNDEFINED_PADDING; | |
| mUserPaddingEnd = UNDEFINED_PADDING; | |
| mRenderNode = RenderNode.create(getClass().getName(), this); | |
| if (!sCompatibilityDone && context != null) { | |
| final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; | |
| // Older apps may need this compatibility hack for measurement. | |
| sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; | |
| // Older apps expect onMeasure() to always be called on a layout pass, regardless | |
| // of whether a layout was requested on that View. | |
| sIgnoreMeasureCache = targetSdkVersion < KITKAT; | |
| Canvas.sCompatibilityRestore = targetSdkVersion < M; | |
| // In M and newer, our widgets can pass a "hint" value in the size | |
| // for UNSPECIFIED MeasureSpecs. This lets child views of scrolling containers | |
| // know what the expected parent size is going to be, so e.g. list items can size | |
| // themselves at 1/3 the size of their container. It breaks older apps though, | |
| // specifically apps that use some popular open source libraries. | |
| sUseZeroUnspecifiedMeasureSpec = targetSdkVersion < M; | |
| sCompatibilityDone = true; | |
| } | |
| } | |
| /** | |
| * Constructor that is called when inflating a view from XML. This is called | |
| * when a view is being constructed from an XML file, supplying attributes | |
| * that were specified in the XML file. This version uses a default style of | |
| * 0, so the only attribute values applied are those in the Context's Theme | |
| * and the given AttributeSet. | |
| * | |
| * <p> | |
| * The method onFinishInflate() will be called after all children have been | |
| * added. | |
| * | |
| * @param context The Context the view is running in, through which it can | |
| * access the current theme, resources, etc. | |
| * @param attrs The attributes of the XML tag that is inflating the view. | |
| * @see #View(Context, AttributeSet, int) | |
| */ | |
| public View(Context context, @Nullable AttributeSet attrs) { | |
| this(context, attrs, 0); | |
| } | |
| /** | |
| * Perform inflation from XML and apply a class-specific base style from a | |
| * theme attribute. This constructor of View allows subclasses to use their | |
| * own base style when they are inflating. For example, a Button class's | |
| * constructor would call this version of the super class constructor and | |
| * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this | |
| * allows the theme's button style to modify all of the base view attributes | |
| * (in particular its background) as well as the Button class's attributes. | |
| * | |
| * @param context The Context the view is running in, through which it can | |
| * access the current theme, resources, etc. | |
| * @param attrs The attributes of the XML tag that is inflating the view. | |
| * @param defStyleAttr An attribute in the current theme that contains a | |
| * reference to a style resource that supplies default values for | |
| * the view. Can be 0 to not look for defaults. | |
| * @see #View(Context, AttributeSet) | |
| */ | |
| public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { | |
| this(context, attrs, defStyleAttr, 0); | |
| } | |
| /** | |
| * Perform inflation from XML and apply a class-specific base style from a | |
| * theme attribute or style resource. This constructor of View allows | |
| * subclasses to use their own base style when they are inflating. | |
| * <p> | |
| * When determining the final value of a particular attribute, there are | |
| * four inputs that come into play: | |
| * <ol> | |
| * <li>Any attribute values in the given AttributeSet. | |
| * <li>The style resource specified in the AttributeSet (named "style"). | |
| * <li>The default style specified by <var>defStyleAttr</var>. | |
| * <li>The default style specified by <var>defStyleRes</var>. | |
| * <li>The base values in this theme. | |
| * </ol> | |
| * <p> | |
| * Each of these inputs is considered in-order, with the first listed taking | |
| * precedence over the following ones. In other words, if in the | |
| * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> | |
| * , then the button's text will <em>always</em> be black, regardless of | |
| * what is specified in any of the styles. | |
| * | |
| * @param context The Context the view is running in, through which it can | |
| * access the current theme, resources, etc. | |
| * @param attrs The attributes of the XML tag that is inflating the view. | |
| * @param defStyleAttr An attribute in the current theme that contains a | |
| * reference to a style resource that supplies default values for | |
| * the view. Can be 0 to not look for defaults. | |
| * @param defStyleRes A resource identifier of a style resource that | |
| * supplies default values for the view, used only if | |
| * defStyleAttr is 0 or can not be found in the theme. Can be 0 | |
| * to not look for defaults. | |
| * @see #View(Context, AttributeSet, int) | |
| */ | |
| public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { | |
| this(context); | |
| final TypedArray a = context.obtainStyledAttributes( | |
| attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); | |
| if (mDebugViewAttributes) { | |
| saveAttributeData(attrs, a); | |
| } | |
| Drawable background = null; | |
| int leftPadding = -1; | |
| int topPadding = -1; | |
| int rightPadding = -1; | |
| int bottomPadding = -1; | |
| int startPadding = UNDEFINED_PADDING; | |
| int endPadding = UNDEFINED_PADDING; | |
| int padding = -1; | |
| int viewFlagValues = 0; | |
| int viewFlagMasks = 0; | |
| boolean setScrollContainer = false; | |
| int x = 0; | |
| int y = 0; | |
| float tx = 0; | |
| float ty = 0; | |
| float tz = 0; | |
| float elevation = 0; | |
| float rotation = 0; | |
| float rotationX = 0; | |
| float rotationY = 0; | |
| float sx = 1f; | |
| float sy = 1f; | |
| boolean transformSet = false; | |
| int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; | |
| int overScrollMode = mOverScrollMode; | |
| boolean initializeScrollbars = false; | |
| boolean initializeScrollIndicators = false; | |
| boolean startPaddingDefined = false; | |
| boolean endPaddingDefined = false; | |
| boolean leftPaddingDefined = false; | |
| boolean rightPaddingDefined = false; | |
| final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; | |
| final int N = a.getIndexCount(); | |
| for (int i = 0; i < N; i++) { | |
| int attr = a.getIndex(i); | |
| switch (attr) { | |
| case com.android.internal.R.styleable.View_background: | |
| background = a.getDrawable(attr); | |
| break; | |
| case com.android.internal.R.styleable.View_padding: | |
| padding = a.getDimensionPixelSize(attr, -1); | |
| mUserPaddingLeftInitial = padding; | |
| mUserPaddingRightInitial = padding; | |
| leftPaddingDefined = true; | |
| rightPaddingDefined = true; | |
| break; | |
| case com.android.internal.R.styleable.View_paddingLeft: | |
| leftPadding = a.getDimensionPixelSize(attr, -1); | |
| mUserPaddingLeftInitial = leftPadding; | |
| leftPaddingDefined = true; | |
| break; | |
| case com.android.internal.R.styleable.View_paddingTop: | |
| topPadding = a.getDimensionPixelSize(attr, -1); | |
| break; | |
| case com.android.internal.R.styleable.View_paddingRight: | |
| rightPadding = a.getDimensionPixelSize(attr, -1); | |
| mUserPaddingRightInitial = rightPadding; | |
| rightPaddingDefined = true; | |
| break; | |
| case com.android.internal.R.styleable.View_paddingBottom: | |
| bottomPadding = a.getDimensionPixelSize(attr, -1); | |
| break; | |
| case com.android.internal.R.styleable.View_paddingStart: | |
| startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); | |
| startPaddingDefined = (startPadding != UNDEFINED_PADDING); | |
| break; | |
| case com.android.internal.R.styleable.View_paddingEnd: | |
| endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); | |
| endPaddingDefined = (endPadding != UNDEFINED_PADDING); | |
| break; | |
| case com.android.internal.R.styleable.View_scrollX: | |
| x = a.getDimensionPixelOffset(attr, 0); | |
| break; | |
| case com.android.internal.R.styleable.View_scrollY: | |
| y = a.getDimensionPixelOffset(attr, 0); | |
| break; | |
| case com.android.internal.R.styleable.View_alpha: | |
| setAlpha(a.getFloat(attr, 1f)); | |
| break; | |
| case com.android.internal.R.styleable.View_transformPivotX: | |
| setPivotX(a.getDimensionPixelOffset(attr, 0)); | |
| break; | |
| case com.android.internal.R.styleable.View_transformPivotY: | |
| setPivotY(a.getDimensionPixelOffset(attr, 0)); | |
| break; | |
| case com.android.internal.R.styleable.View_translationX: | |
| tx = a.getDimensionPixelOffset(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_translationY: | |
| ty = a.getDimensionPixelOffset(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_translationZ: | |
| tz = a.getDimensionPixelOffset(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_elevation: | |
| elevation = a.getDimensionPixelOffset(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_rotation: | |
| rotation = a.getFloat(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_rotationX: | |
| rotationX = a.getFloat(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_rotationY: | |
| rotationY = a.getFloat(attr, 0); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_scaleX: | |
| sx = a.getFloat(attr, 1f); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_scaleY: | |
| sy = a.getFloat(attr, 1f); | |
| transformSet = true; | |
| break; | |
| case com.android.internal.R.styleable.View_id: | |
| mID = a.getResourceId(attr, NO_ID); | |
| break; | |
| case com.android.internal.R.styleable.View_tag: | |
| mTag = a.getText(attr); | |
| break; | |
| case com.android.internal.R.styleable.View_fitsSystemWindows: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= FITS_SYSTEM_WINDOWS; | |
| viewFlagMasks |= FITS_SYSTEM_WINDOWS; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_focusable: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= FOCUSABLE; | |
| viewFlagMasks |= FOCUSABLE_MASK; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_focusableInTouchMode: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; | |
| viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_clickable: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= CLICKABLE; | |
| viewFlagMasks |= CLICKABLE; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_longClickable: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= LONG_CLICKABLE; | |
| viewFlagMasks |= LONG_CLICKABLE; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_contextClickable: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= CONTEXT_CLICKABLE; | |
| viewFlagMasks |= CONTEXT_CLICKABLE; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_saveEnabled: | |
| if (!a.getBoolean(attr, true)) { | |
| viewFlagValues |= SAVE_DISABLED; | |
| viewFlagMasks |= SAVE_DISABLED_MASK; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_duplicateParentState: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= DUPLICATE_PARENT_STATE; | |
| viewFlagMasks |= DUPLICATE_PARENT_STATE; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_visibility: | |
| final int visibility = a.getInt(attr, 0); | |
| if (visibility != 0) { | |
| viewFlagValues |= VISIBILITY_FLAGS[visibility]; | |
| viewFlagMasks |= VISIBILITY_MASK; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_layoutDirection: | |
| // Clear any layout direction flags (included resolved bits) already set | |
| mPrivateFlags2 &= | |
| ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); | |
| // Set the layout direction flags depending on the value of the attribute | |
| final int layoutDirection = a.getInt(attr, -1); | |
| final int value = (layoutDirection != -1) ? | |
| LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; | |
| mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); | |
| break; | |
| case com.android.internal.R.styleable.View_drawingCacheQuality: | |
| final int cacheQuality = a.getInt(attr, 0); | |
| if (cacheQuality != 0) { | |
| viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; | |
| viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_contentDescription: | |
| setContentDescription(a.getString(attr)); | |
| break; | |
| case com.android.internal.R.styleable.View_accessibilityTraversalBefore: | |
| setAccessibilityTraversalBefore(a.getResourceId(attr, NO_ID)); | |
| break; | |
| case com.android.internal.R.styleable.View_accessibilityTraversalAfter: | |
| setAccessibilityTraversalAfter(a.getResourceId(attr, NO_ID)); | |
| break; | |
| case com.android.internal.R.styleable.View_labelFor: | |
| setLabelFor(a.getResourceId(attr, NO_ID)); | |
| break; | |
| case com.android.internal.R.styleable.View_soundEffectsEnabled: | |
| if (!a.getBoolean(attr, true)) { | |
| viewFlagValues &= ~SOUND_EFFECTS_ENABLED; | |
| viewFlagMasks |= SOUND_EFFECTS_ENABLED; | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_hapticFeedbackEnabled: | |
| if (!a.getBoolean(attr, true)) { | |
| viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; | |
| viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; | |
| } | |
| break; | |
| case R.styleable.View_scrollbars: | |
| final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); | |
| if (scrollbars != SCROLLBARS_NONE) { | |
| viewFlagValues |= scrollbars; | |
| viewFlagMasks |= SCROLLBARS_MASK; | |
| initializeScrollbars = true; | |
| } | |
| break; | |
| //noinspection deprecation | |
| case R.styleable.View_fadingEdge: | |
| if (targetSdkVersion >= ICE_CREAM_SANDWICH) { | |
| // Ignore the attribute starting with ICS | |
| break; | |
| } | |
| // With builds < ICS, fall through and apply fading edges | |
| case R.styleable.View_requiresFadingEdge: | |
| final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); | |
| if (fadingEdge != FADING_EDGE_NONE) { | |
| viewFlagValues |= fadingEdge; | |
| viewFlagMasks |= FADING_EDGE_MASK; | |
| initializeFadingEdgeInternal(a); | |
| } | |
| break; | |
| case R.styleable.View_scrollbarStyle: | |
| scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); | |
| if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { | |
| viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; | |
| viewFlagMasks |= SCROLLBARS_STYLE_MASK; | |
| } | |
| break; | |
| case R.styleable.View_isScrollContainer: | |
| setScrollContainer = true; | |
| if (a.getBoolean(attr, false)) { | |
| setScrollContainer(true); | |
| } | |
| break; | |
| case com.android.internal.R.styleable.View_keepScreenOn: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= KEEP_SCREEN_ON; | |
| viewFlagMasks |= KEEP_SCREEN_ON; | |
| } | |
| break; | |
| case R.styleable.View_filterTouchesWhenObscured: | |
| if (a.getBoolean(attr, false)) { | |
| viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; | |
| viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; | |
| } | |
| break; | |
| case R.styleable.View_nextFocusLeft: | |
| mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); | |
| break; | |
| case R.styleable.View_nextFocusRight: | |
| mNextFocusRightId = a.getResourceId(attr, View.NO_ID); | |
| break; | |
| case R.styleable.View_nextFocusUp: | |
| mNextFocusUpId = a.getResourceId(attr, View.NO_ID); | |
| break; | |
| case R.styleable.View_nextFocusDown: | |
| mNextFocusDownId = a.getResourceId(attr, View.NO_ID); | |
| break; | |
| case R.styleable.View_nextFocusForward: | |
| mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); | |
| break; | |
| case R.styleable.View_minWidth: | |
| mMinWidth = a.getDimensionPixelSize(attr, 0); | |
| break; | |
| case R.styleable.View_minHeight: | |
| mMinHeight = a.getDimensionPixelSize(attr, 0); | |
| break; | |
| case R.styleable.View_onClick: | |
| if (context.isRestricted()) { | |
| throw new IllegalStateException("The android:onClick attribute cannot " | |
| + "be used within a restricted context"); | |
| } | |
| final String handlerName = a.getString(attr); | |
| if (handlerName != null) { | |
| setOnClickListener(new DeclaredOnClickListener(this, handlerName)); | |
| } | |
| break; | |
| case R.styleable.View_overScrollMode: | |
| overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); | |
| break; | |
| case R.styleable.View_verticalScrollbarPosition: | |
| mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); | |
| break; | |
| case R.styleable.View_layerType: | |
| setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); | |
| break; | |
| case R.styleable.View_textDirection: | |
| // Clear any text direction flag already set | |
| mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; | |
| // Set the text direction flags depending on the value of the attribute | |
| final int textDirection = a.getInt(attr, -1); | |
| if (textDirection != -1) { | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; | |
| } | |
| break; | |
| case R.styleable.View_textAlignment: | |
| // Clear any text alignment flag already set | |
| mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; | |
| // Set the text alignment flag depending on the value of the attribute | |
| final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; | |
| break; | |
| case R.styleable.View_importantForAccessibility: | |
| setImportantForAccessibility(a.getInt(attr, | |
| IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); | |
| break; | |
| case R.styleable.View_accessibilityLiveRegion: | |
| setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); | |
| break; | |
| case R.styleable.View_transitionName: | |
| setTransitionName(a.getString(attr)); | |
| break; | |
| case R.styleable.View_nestedScrollingEnabled: | |
| setNestedScrollingEnabled(a.getBoolean(attr, false)); | |
| break; | |
| case R.styleable.View_stateListAnimator: | |
| setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, | |
| a.getResourceId(attr, 0))); | |
| break; | |
| case R.styleable.View_backgroundTint: | |
| // This will get applied later during setBackground(). | |
| if (mBackgroundTint == null) { | |
| mBackgroundTint = new TintInfo(); | |
| } | |
| mBackgroundTint.mTintList = a.getColorStateList( | |
| R.styleable.View_backgroundTint); | |
| mBackgroundTint.mHasTintList = true; | |
| break; | |
| case R.styleable.View_backgroundTintMode: | |
| // This will get applied later during setBackground(). | |
| if (mBackgroundTint == null) { | |
| mBackgroundTint = new TintInfo(); | |
| } | |
| mBackgroundTint.mTintMode = Drawable.parseTintMode(a.getInt( | |
| R.styleable.View_backgroundTintMode, -1), null); | |
| mBackgroundTint.mHasTintMode = true; | |
| break; | |
| case R.styleable.View_outlineProvider: | |
| setOutlineProviderFromAttribute(a.getInt(R.styleable.View_outlineProvider, | |
| PROVIDER_BACKGROUND)); | |
| break; | |
| case R.styleable.View_foreground: | |
| if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { | |
| setForeground(a.getDrawable(attr)); | |
| } | |
| break; | |
| case R.styleable.View_foregroundGravity: | |
| if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { | |
| setForegroundGravity(a.getInt(attr, Gravity.NO_GRAVITY)); | |
| } | |
| break; | |
| case R.styleable.View_foregroundTintMode: | |
| if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { | |
| setForegroundTintMode(Drawable.parseTintMode(a.getInt(attr, -1), null)); | |
| } | |
| break; | |
| case R.styleable.View_foregroundTint: | |
| if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { | |
| setForegroundTintList(a.getColorStateList(attr)); | |
| } | |
| break; | |
| case R.styleable.View_foregroundInsidePadding: | |
| if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { | |
| if (mForegroundInfo == null) { | |
| mForegroundInfo = new ForegroundInfo(); | |
| } | |
| mForegroundInfo.mInsidePadding = a.getBoolean(attr, | |
| mForegroundInfo.mInsidePadding); | |
| } | |
| break; | |
| case R.styleable.View_scrollIndicators: | |
| final int scrollIndicators = | |
| (a.getInt(attr, 0) << SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT) | |
| & SCROLL_INDICATORS_PFLAG3_MASK; | |
| if (scrollIndicators != 0) { | |
| mPrivateFlags3 |= scrollIndicators; | |
| initializeScrollIndicators = true; | |
| } | |
| break; | |
| } | |
| } | |
| setOverScrollMode(overScrollMode); | |
| // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet | |
| // the resolved layout direction). Those cached values will be used later during padding | |
| // resolution. | |
| mUserPaddingStart = startPadding; | |
| mUserPaddingEnd = endPadding; | |
| if (background != null) { | |
| setBackground(background); | |
| } | |
| // setBackground above will record that padding is currently provided by the background. | |
| // If we have padding specified via xml, record that here instead and use it. | |
| mLeftPaddingDefined = leftPaddingDefined; | |
| mRightPaddingDefined = rightPaddingDefined; | |
| if (padding >= 0) { | |
| leftPadding = padding; | |
| topPadding = padding; | |
| rightPadding = padding; | |
| bottomPadding = padding; | |
| mUserPaddingLeftInitial = padding; | |
| mUserPaddingRightInitial = padding; | |
| } | |
| if (isRtlCompatibilityMode()) { | |
| // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. | |
| // left / right padding are used if defined (meaning here nothing to do). If they are not | |
| // defined and start / end padding are defined (e.g. in Frameworks resources), then we use | |
| // start / end and resolve them as left / right (layout direction is not taken into account). | |
| // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial | |
| // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if | |
| // defined. | |
| if (!mLeftPaddingDefined && startPaddingDefined) { | |
| leftPadding = startPadding; | |
| } | |
| mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; | |
| if (!mRightPaddingDefined && endPaddingDefined) { | |
| rightPadding = endPadding; | |
| } | |
| mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; | |
| } else { | |
| // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right | |
| // values defined. Otherwise, left /right values are used. | |
| // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial | |
| // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if | |
| // defined. | |
| final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; | |
| if (mLeftPaddingDefined && !hasRelativePadding) { | |
| mUserPaddingLeftInitial = leftPadding; | |
| } | |
| if (mRightPaddingDefined && !hasRelativePadding) { | |
| mUserPaddingRightInitial = rightPadding; | |
| } | |
| } | |
| internalSetPadding( | |
| mUserPaddingLeftInitial, | |
| topPadding >= 0 ? topPadding : mPaddingTop, | |
| mUserPaddingRightInitial, | |
| bottomPadding >= 0 ? bottomPadding : mPaddingBottom); | |
| if (viewFlagMasks != 0) { | |
| setFlags(viewFlagValues, viewFlagMasks); | |
| } | |
| if (initializeScrollbars) { | |
| initializeScrollbarsInternal(a); | |
| } | |
| if (initializeScrollIndicators) { | |
| initializeScrollIndicatorsInternal(); | |
| } | |
| a.recycle(); | |
| // Needs to be called after mViewFlags is set | |
| if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { | |
| recomputePadding(); | |
| } | |
| if (x != 0 || y != 0) { | |
| scrollTo(x, y); | |
| } | |
| if (transformSet) { | |
| setTranslationX(tx); | |
| setTranslationY(ty); | |
| setTranslationZ(tz); | |
| setElevation(elevation); | |
| setRotation(rotation); | |
| setRotationX(rotationX); | |
| setRotationY(rotationY); | |
| setScaleX(sx); | |
| setScaleY(sy); | |
| } | |
| if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { | |
| setScrollContainer(true); | |
| } | |
| computeOpaqueFlags(); | |
| } | |
| /** | |
| * An implementation of OnClickListener that attempts to lazily load a | |
| * named click handling method from a parent or ancestor context. | |
| */ | |
| private static class DeclaredOnClickListener implements OnClickListener { | |
| private final View mHostView; | |
| private final String mMethodName; | |
| private Method mMethod; | |
| public DeclaredOnClickListener(@NonNull View hostView, @NonNull String methodName) { | |
| mHostView = hostView; | |
| mMethodName = methodName; | |
| } | |
| @Override | |
| public void onClick(@NonNull View v) { | |
| if (mMethod == null) { | |
| mMethod = resolveMethod(mHostView.getContext(), mMethodName); | |
| } | |
| try { | |
| mMethod.invoke(mHostView.getContext(), v); | |
| } catch (IllegalAccessException e) { | |
| throw new IllegalStateException( | |
| "Could not execute non-public method for android:onClick", e); | |
| } catch (InvocationTargetException e) { | |
| throw new IllegalStateException( | |
| "Could not execute method for android:onClick", e); | |
| } | |
| } | |
| @NonNull | |
| private Method resolveMethod(@Nullable Context context, @NonNull String name) { | |
| while (context != null) { | |
| try { | |
| if (!context.isRestricted()) { | |
| return context.getClass().getMethod(mMethodName, View.class); | |
| } | |
| } catch (NoSuchMethodException e) { | |
| // Failed to find method, keep searching up the hierarchy. | |
| } | |
| if (context instanceof ContextWrapper) { | |
| context = ((ContextWrapper) context).getBaseContext(); | |
| } else { | |
| // Can't search up the hierarchy, null out and fail. | |
| context = null; | |
| } | |
| } | |
| final int id = mHostView.getId(); | |
| final String idText = id == NO_ID ? "" : " with id '" | |
| + mHostView.getContext().getResources().getResourceEntryName(id) + "'"; | |
| throw new IllegalStateException("Could not find method " + mMethodName | |
| + "(View) in a parent or ancestor Context for android:onClick " | |
| + "attribute defined on view " + mHostView.getClass() + idText); | |
| } | |
| } | |
| /** | |
| * Non-public constructor for use in testing | |
| */ | |
| View() { | |
| mResources = null; | |
| mRenderNode = RenderNode.create(getClass().getName(), this); | |
| } | |
| private static SparseArray<String> getAttributeMap() { | |
| if (mAttributeMap == null) { | |
| mAttributeMap = new SparseArray<>(); | |
| } | |
| return mAttributeMap; | |
| } | |
| private void saveAttributeData(@Nullable AttributeSet attrs, @NonNull TypedArray t) { | |
| final int attrsCount = attrs == null ? 0 : attrs.getAttributeCount(); | |
| final int indexCount = t.getIndexCount(); | |
| final String[] attributes = new String[(attrsCount + indexCount) * 2]; | |
| int i = 0; | |
| // Store raw XML attributes. | |
| for (int j = 0; j < attrsCount; ++j) { | |
| attributes[i] = attrs.getAttributeName(j); | |
| attributes[i + 1] = attrs.getAttributeValue(j); | |
| i += 2; | |
| } | |
| // Store resolved styleable attributes. | |
| final Resources res = t.getResources(); | |
| final SparseArray<String> attributeMap = getAttributeMap(); | |
| for (int j = 0; j < indexCount; ++j) { | |
| final int index = t.getIndex(j); | |
| if (!t.hasValueOrEmpty(index)) { | |
| // Value is undefined. Skip it. | |
| continue; | |
| } | |
| final int resourceId = t.getResourceId(index, 0); | |
| if (resourceId == 0) { | |
| // Value is not a reference. Skip it. | |
| continue; | |
| } | |
| String resourceName = attributeMap.get(resourceId); | |
| if (resourceName == null) { | |
| try { | |
| resourceName = res.getResourceName(resourceId); | |
| } catch (Resources.NotFoundException e) { | |
| resourceName = "0x" + Integer.toHexString(resourceId); | |
| } | |
| attributeMap.put(resourceId, resourceName); | |
| } | |
| attributes[i] = resourceName; | |
| attributes[i + 1] = t.getString(index); | |
| i += 2; | |
| } | |
| // Trim to fit contents. | |
| final String[] trimmed = new String[i]; | |
| System.arraycopy(attributes, 0, trimmed, 0, i); | |
| mAttributes = trimmed; | |
| } | |
| public String toString() { | |
| StringBuilder out = new StringBuilder(128); | |
| out.append(getClass().getName()); | |
| out.append('{'); | |
| out.append(Integer.toHexString(System.identityHashCode(this))); | |
| out.append(' '); | |
| switch (mViewFlags&VISIBILITY_MASK) { | |
| case VISIBLE: out.append('V'); break; | |
| case INVISIBLE: out.append('I'); break; | |
| case GONE: out.append('G'); break; | |
| default: out.append('.'); break; | |
| } | |
| out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); | |
| out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); | |
| out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); | |
| out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); | |
| out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); | |
| out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); | |
| out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); | |
| out.append((mViewFlags&CONTEXT_CLICKABLE) != 0 ? 'X' : '.'); | |
| out.append(' '); | |
| out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); | |
| out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); | |
| out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); | |
| if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { | |
| out.append('p'); | |
| } else { | |
| out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); | |
| } | |
| out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); | |
| out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); | |
| out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); | |
| out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); | |
| out.append(' '); | |
| out.append(mLeft); | |
| out.append(','); | |
| out.append(mTop); | |
| out.append('-'); | |
| out.append(mRight); | |
| out.append(','); | |
| out.append(mBottom); | |
| final int id = getId(); | |
| if (id != NO_ID) { | |
| out.append(" #"); | |
| out.append(Integer.toHexString(id)); | |
| final Resources r = mResources; | |
| if (id > 0 && Resources.resourceHasPackage(id) && r != null) { | |
| try { | |
| String pkgname; | |
| switch (id&0xff000000) { | |
| case 0x7f000000: | |
| pkgname="app"; | |
| break; | |
| case 0x01000000: | |
| pkgname="android"; | |
| break; | |
| default: | |
| pkgname = r.getResourcePackageName(id); | |
| break; | |
| } | |
| String typename = r.getResourceTypeName(id); | |
| String entryname = r.getResourceEntryName(id); | |
| out.append(" "); | |
| out.append(pkgname); | |
| out.append(":"); | |
| out.append(typename); | |
| out.append("/"); | |
| out.append(entryname); | |
| } catch (Resources.NotFoundException e) { | |
| } | |
| } | |
| } | |
| out.append("}"); | |
| return out.toString(); | |
| } | |
| /** | |
| * <p> | |
| * Initializes the fading edges from a given set of styled attributes. This | |
| * method should be called by subclasses that need fading edges and when an | |
| * instance of these subclasses is created programmatically rather than | |
| * being inflated from XML. This method is automatically called when the XML | |
| * is inflated. | |
| * </p> | |
| * | |
| * @param a the styled attributes set to initialize the fading edges from | |
| * | |
| * @removed | |
| */ | |
| protected void initializeFadingEdge(TypedArray a) { | |
| // This method probably shouldn't have been included in the SDK to begin with. | |
| // It relies on 'a' having been initialized using an attribute filter array that is | |
| // not publicly available to the SDK. The old method has been renamed | |
| // to initializeFadingEdgeInternal and hidden for framework use only; | |
| // this one initializes using defaults to make it safe to call for apps. | |
| TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); | |
| initializeFadingEdgeInternal(arr); | |
| arr.recycle(); | |
| } | |
| /** | |
| * <p> | |
| * Initializes the fading edges from a given set of styled attributes. This | |
| * method should be called by subclasses that need fading edges and when an | |
| * instance of these subclasses is created programmatically rather than | |
| * being inflated from XML. This method is automatically called when the XML | |
| * is inflated. | |
| * </p> | |
| * | |
| * @param a the styled attributes set to initialize the fading edges from | |
| * @hide This is the real method; the public one is shimmed to be safe to call from apps. | |
| */ | |
| protected void initializeFadingEdgeInternal(TypedArray a) { | |
| initScrollCache(); | |
| mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( | |
| R.styleable.View_fadingEdgeLength, | |
| ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); | |
| } | |
| /** | |
| * Returns the size of the vertical faded edges used to indicate that more | |
| * content in this view is visible. | |
| * | |
| * @return The size in pixels of the vertical faded edge or 0 if vertical | |
| * faded edges are not enabled for this view. | |
| * @attr ref android.R.styleable#View_fadingEdgeLength | |
| */ | |
| public int getVerticalFadingEdgeLength() { | |
| if (isVerticalFadingEdgeEnabled()) { | |
| ScrollabilityCache cache = mScrollCache; | |
| if (cache != null) { | |
| return cache.fadingEdgeLength; | |
| } | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Set the size of the faded edge used to indicate that more content in this | |
| * view is available. Will not change whether the fading edge is enabled; use | |
| * {@link #setVerticalFadingEdgeEnabled(boolean)} or | |
| * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge | |
| * for the vertical or horizontal fading edges. | |
| * | |
| * @param length The size in pixels of the faded edge used to indicate that more | |
| * content in this view is visible. | |
| */ | |
| public void setFadingEdgeLength(int length) { | |
| initScrollCache(); | |
| mScrollCache.fadingEdgeLength = length; | |
| } | |
| /** | |
| * Returns the size of the horizontal faded edges used to indicate that more | |
| * content in this view is visible. | |
| * | |
| * @return The size in pixels of the horizontal faded edge or 0 if horizontal | |
| * faded edges are not enabled for this view. | |
| * @attr ref android.R.styleable#View_fadingEdgeLength | |
| */ | |
| public int getHorizontalFadingEdgeLength() { | |
| if (isHorizontalFadingEdgeEnabled()) { | |
| ScrollabilityCache cache = mScrollCache; | |
| if (cache != null) { | |
| return cache.fadingEdgeLength; | |
| } | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Returns the width of the vertical scrollbar. | |
| * | |
| * @return The width in pixels of the vertical scrollbar or 0 if there | |
| * is no vertical scrollbar. | |
| */ | |
| public int getVerticalScrollbarWidth() { | |
| ScrollabilityCache cache = mScrollCache; | |
| if (cache != null) { | |
| ScrollBarDrawable scrollBar = cache.scrollBar; | |
| if (scrollBar != null) { | |
| int size = scrollBar.getSize(true); | |
| if (size <= 0) { | |
| size = cache.scrollBarSize; | |
| } | |
| return size; | |
| } | |
| return 0; | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Returns the height of the horizontal scrollbar. | |
| * | |
| * @return The height in pixels of the horizontal scrollbar or 0 if | |
| * there is no horizontal scrollbar. | |
| */ | |
| protected int getHorizontalScrollbarHeight() { | |
| ScrollabilityCache cache = mScrollCache; | |
| if (cache != null) { | |
| ScrollBarDrawable scrollBar = cache.scrollBar; | |
| if (scrollBar != null) { | |
| int size = scrollBar.getSize(false); | |
| if (size <= 0) { | |
| size = cache.scrollBarSize; | |
| } | |
| return size; | |
| } | |
| return 0; | |
| } | |
| return 0; | |
| } | |
| /** | |
| * <p> | |
| * Initializes the scrollbars from a given set of styled attributes. This | |
| * method should be called by subclasses that need scrollbars and when an | |
| * instance of these subclasses is created programmatically rather than | |
| * being inflated from XML. This method is automatically called when the XML | |
| * is inflated. | |
| * </p> | |
| * | |
| * @param a the styled attributes set to initialize the scrollbars from | |
| * | |
| * @removed | |
| */ | |
| protected void initializeScrollbars(TypedArray a) { | |
| // It's not safe to use this method from apps. The parameter 'a' must have been obtained | |
| // using the View filter array which is not available to the SDK. As such, internal | |
| // framework usage now uses initializeScrollbarsInternal and we grab a default | |
| // TypedArray with the right filter instead here. | |
| TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); | |
| initializeScrollbarsInternal(arr); | |
| // We ignored the method parameter. Recycle the one we actually did use. | |
| arr.recycle(); | |
| } | |
| /** | |
| * <p> | |
| * Initializes the scrollbars from a given set of styled attributes. This | |
| * method should be called by subclasses that need scrollbars and when an | |
| * instance of these subclasses is created programmatically rather than | |
| * being inflated from XML. This method is automatically called when the XML | |
| * is inflated. | |
| * </p> | |
| * | |
| * @param a the styled attributes set to initialize the scrollbars from | |
| * @hide | |
| */ | |
| protected void initializeScrollbarsInternal(TypedArray a) { | |
| initScrollCache(); | |
| final ScrollabilityCache scrollabilityCache = mScrollCache; | |
| if (scrollabilityCache.scrollBar == null) { | |
| scrollabilityCache.scrollBar = new ScrollBarDrawable(); | |
| scrollabilityCache.scrollBar.setCallback(this); | |
| scrollabilityCache.scrollBar.setState(getDrawableState()); | |
| } | |
| final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); | |
| if (!fadeScrollbars) { | |
| scrollabilityCache.state = ScrollabilityCache.ON; | |
| } | |
| scrollabilityCache.fadeScrollBars = fadeScrollbars; | |
| scrollabilityCache.scrollBarFadeDuration = a.getInt( | |
| R.styleable.View_scrollbarFadeDuration, ViewConfiguration | |
| .getScrollBarFadeDuration()); | |
| scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( | |
| R.styleable.View_scrollbarDefaultDelayBeforeFade, | |
| ViewConfiguration.getScrollDefaultDelay()); | |
| scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( | |
| com.android.internal.R.styleable.View_scrollbarSize, | |
| ViewConfiguration.get(mContext).getScaledScrollBarSize()); | |
| Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); | |
| scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); | |
| Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); | |
| if (thumb != null) { | |
| scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); | |
| } | |
| boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, | |
| false); | |
| if (alwaysDraw) { | |
| scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); | |
| } | |
| track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); | |
| scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); | |
| thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); | |
| if (thumb != null) { | |
| scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); | |
| } | |
| alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, | |
| false); | |
| if (alwaysDraw) { | |
| scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); | |
| } | |
| // Apply layout direction to the new Drawables if needed | |
| final int layoutDirection = getLayoutDirection(); | |
| if (track != null) { | |
| track.setLayoutDirection(layoutDirection); | |
| } | |
| if (thumb != null) { | |
| thumb.setLayoutDirection(layoutDirection); | |
| } | |
| // Re-apply user/background padding so that scrollbar(s) get added | |
| resolvePadding(); | |
| } | |
| private void initializeScrollIndicatorsInternal() { | |
| // Some day maybe we'll break this into top/left/start/etc. and let the | |
| // client control it. Until then, you can have any scroll indicator you | |
| // want as long as it's a 1dp foreground-colored rectangle. | |
| if (mScrollIndicatorDrawable == null) { | |
| mScrollIndicatorDrawable = mContext.getDrawable(R.drawable.scroll_indicator_material); | |
| } | |
| } | |
| /** | |
| * <p> | |
| * Initalizes the scrollability cache if necessary. | |
| * </p> | |
| */ | |
| private void initScrollCache() { | |
| if (mScrollCache == null) { | |
| mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); | |
| } | |
| } | |
| private ScrollabilityCache getScrollCache() { | |
| initScrollCache(); | |
| return mScrollCache; | |
| } | |
| /** | |
| * Set the position of the vertical scroll bar. Should be one of | |
| * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or | |
| * {@link #SCROLLBAR_POSITION_RIGHT}. | |
| * | |
| * @param position Where the vertical scroll bar should be positioned. | |
| */ | |
| public void setVerticalScrollbarPosition(int position) { | |
| if (mVerticalScrollbarPosition != position) { | |
| mVerticalScrollbarPosition = position; | |
| computeOpaqueFlags(); | |
| resolvePadding(); | |
| } | |
| } | |
| /** | |
| * @return The position where the vertical scroll bar will show, if applicable. | |
| * @see #setVerticalScrollbarPosition(int) | |
| */ | |
| public int getVerticalScrollbarPosition() { | |
| return mVerticalScrollbarPosition; | |
| } | |
| /** | |
| * Sets the state of all scroll indicators. | |
| * <p> | |
| * See {@link #setScrollIndicators(int, int)} for usage information. | |
| * | |
| * @param indicators a bitmask of indicators that should be enabled, or | |
| * {@code 0} to disable all indicators | |
| * @see #setScrollIndicators(int, int) | |
| * @see #getScrollIndicators() | |
| * @attr ref android.R.styleable#View_scrollIndicators | |
| */ | |
| public void setScrollIndicators(@ScrollIndicators int indicators) { | |
| setScrollIndicators(indicators, | |
| SCROLL_INDICATORS_PFLAG3_MASK >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT); | |
| } | |
| /** | |
| * Sets the state of the scroll indicators specified by the mask. To change | |
| * all scroll indicators at once, see {@link #setScrollIndicators(int)}. | |
| * <p> | |
| * When a scroll indicator is enabled, it will be displayed if the view | |
| * can scroll in the direction of the indicator. | |
| * <p> | |
| * Multiple indicator types may be enabled or disabled by passing the | |
| * logical OR of the desired types. If multiple types are specified, they | |
| * will all be set to the same enabled state. | |
| * <p> | |
| * For example, to enable the top scroll indicatorExample: {@code setScrollIndicators | |
| * | |
| * @param indicators the indicator direction, or the logical OR of multiple | |
| * indicator directions. One or more of: | |
| * <ul> | |
| * <li>{@link #SCROLL_INDICATOR_TOP}</li> | |
| * <li>{@link #SCROLL_INDICATOR_BOTTOM}</li> | |
| * <li>{@link #SCROLL_INDICATOR_LEFT}</li> | |
| * <li>{@link #SCROLL_INDICATOR_RIGHT}</li> | |
| * <li>{@link #SCROLL_INDICATOR_START}</li> | |
| * <li>{@link #SCROLL_INDICATOR_END}</li> | |
| * </ul> | |
| * @see #setScrollIndicators(int) | |
| * @see #getScrollIndicators() | |
| * @attr ref android.R.styleable#View_scrollIndicators | |
| */ | |
| public void setScrollIndicators(@ScrollIndicators int indicators, @ScrollIndicators int mask) { | |
| // Shift and sanitize mask. | |
| mask <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| mask &= SCROLL_INDICATORS_PFLAG3_MASK; | |
| // Shift and mask indicators. | |
| indicators <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| indicators &= mask; | |
| // Merge with non-masked flags. | |
| final int updatedFlags = indicators | (mPrivateFlags3 & ~mask); | |
| if (mPrivateFlags3 != updatedFlags) { | |
| mPrivateFlags3 = updatedFlags; | |
| if (indicators != 0) { | |
| initializeScrollIndicatorsInternal(); | |
| } | |
| invalidate(); | |
| } | |
| } | |
| /** | |
| * Returns a bitmask representing the enabled scroll indicators. | |
| * <p> | |
| * For example, if the top and left scroll indicators are enabled and all | |
| * other indicators are disabled, the return value will be | |
| * {@code View.SCROLL_INDICATOR_TOP | View.SCROLL_INDICATOR_LEFT}. | |
| * <p> | |
| * To check whether the bottom scroll indicator is enabled, use the value | |
| * of {@code (getScrollIndicators() & View.SCROLL_INDICATOR_BOTTOM) != 0}. | |
| * | |
| * @return a bitmask representing the enabled scroll indicators | |
| */ | |
| @ScrollIndicators | |
| public int getScrollIndicators() { | |
| return (mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) | |
| >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; | |
| } | |
| ListenerInfo getListenerInfo() { | |
| if (mListenerInfo != null) { | |
| return mListenerInfo; | |
| } | |
| mListenerInfo = new ListenerInfo(); | |
| return mListenerInfo; | |
| } | |
| /** | |
| * Register a callback to be invoked when the scroll X or Y positions of | |
| * this view change. | |
| * <p> | |
| * <b>Note:</b> Some views handle scrolling independently from View and may | |
| * have their own separate listeners for scroll-type events. For example, | |
| * {@link android.widget.ListView ListView} allows clients to register an | |
| * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} | |
| * to listen for changes in list scroll position. | |
| * | |
| * @param l The listener to notify when the scroll X or Y position changes. | |
| * @see android.view.View#getScrollX() | |
| * @see android.view.View#getScrollY() | |
| */ | |
| public void setOnScrollChangeListener(OnScrollChangeListener l) { | |
| getListenerInfo().mOnScrollChangeListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when focus of this view changed. | |
| * | |
| * @param l The callback that will run. | |
| */ | |
| public void setOnFocusChangeListener(OnFocusChangeListener l) { | |
| getListenerInfo().mOnFocusChangeListener = l; | |
| } | |
| /** | |
| * Add a listener that will be called when the bounds of the view change due to | |
| * layout processing. | |
| * | |
| * @param listener The listener that will be called when layout bounds change. | |
| */ | |
| public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { | |
| ListenerInfo li = getListenerInfo(); | |
| if (li.mOnLayoutChangeListeners == null) { | |
| li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); | |
| } | |
| if (!li.mOnLayoutChangeListeners.contains(listener)) { | |
| li.mOnLayoutChangeListeners.add(listener); | |
| } | |
| } | |
| /** | |
| * Remove a listener for layout changes. | |
| * | |
| * @param listener The listener for layout bounds change. | |
| */ | |
| public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { | |
| ListenerInfo li = mListenerInfo; | |
| if (li == null || li.mOnLayoutChangeListeners == null) { | |
| return; | |
| } | |
| li.mOnLayoutChangeListeners.remove(listener); | |
| } | |
| /** | |
| * Add a listener for attach state changes. | |
| * | |
| * This listener will be called whenever this view is attached or detached | |
| * from a window. Remove the listener using | |
| * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. | |
| * | |
| * @param listener Listener to attach | |
| * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) | |
| */ | |
| public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { | |
| ListenerInfo li = getListenerInfo(); | |
| if (li.mOnAttachStateChangeListeners == null) { | |
| li.mOnAttachStateChangeListeners | |
| = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); | |
| } | |
| li.mOnAttachStateChangeListeners.add(listener); | |
| } | |
| /** | |
| * Remove a listener for attach state changes. The listener will receive no further | |
| * notification of window attach/detach events. | |
| * | |
| * @param listener Listener to remove | |
| * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) | |
| */ | |
| public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { | |
| ListenerInfo li = mListenerInfo; | |
| if (li == null || li.mOnAttachStateChangeListeners == null) { | |
| return; | |
| } | |
| li.mOnAttachStateChangeListeners.remove(listener); | |
| } | |
| /** | |
| * Returns the focus-change callback registered for this view. | |
| * | |
| * @return The callback, or null if one is not registered. | |
| */ | |
| public OnFocusChangeListener getOnFocusChangeListener() { | |
| ListenerInfo li = mListenerInfo; | |
| return li != null ? li.mOnFocusChangeListener : null; | |
| } | |
| /** | |
| * Register a callback to be invoked when this view is clicked. If this view is not | |
| * clickable, it becomes clickable. | |
| * | |
| * @param l The callback that will run | |
| * | |
| * @see #setClickable(boolean) | |
| */ | |
| public void setOnClickListener(@Nullable OnClickListener l) { | |
| if (!isClickable()) { | |
| setClickable(true); | |
| } | |
| getListenerInfo().mOnClickListener = l; | |
| } | |
| /** | |
| * Return whether this view has an attached OnClickListener. Returns | |
| * true if there is a listener, false if there is none. | |
| */ | |
| public boolean hasOnClickListeners() { | |
| ListenerInfo li = mListenerInfo; | |
| return (li != null && li.mOnClickListener != null); | |
| } | |
| /** | |
| * Register a callback to be invoked when this view is clicked and held. If this view is not | |
| * long clickable, it becomes long clickable. | |
| * | |
| * @param l The callback that will run | |
| * | |
| * @see #setLongClickable(boolean) | |
| */ | |
| public void setOnLongClickListener(@Nullable OnLongClickListener l) { | |
| if (!isLongClickable()) { | |
| setLongClickable(true); | |
| } | |
| getListenerInfo().mOnLongClickListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when this view is context clicked. If the view is not | |
| * context clickable, it becomes context clickable. | |
| * | |
| * @param l The callback that will run | |
| * @see #setContextClickable(boolean) | |
| */ | |
| public void setOnContextClickListener(@Nullable OnContextClickListener l) { | |
| if (!isContextClickable()) { | |
| setContextClickable(true); | |
| } | |
| getListenerInfo().mOnContextClickListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when the context menu for this view is | |
| * being built. If this view is not long clickable, it becomes long clickable. | |
| * | |
| * @param l The callback that will run | |
| * | |
| */ | |
| public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { | |
| if (!isLongClickable()) { | |
| setLongClickable(true); | |
| } | |
| getListenerInfo().mOnCreateContextMenuListener = l; | |
| } | |
| /** | |
| * Call this view's OnClickListener, if it is defined. Performs all normal | |
| * actions associated with clicking: reporting accessibility event, playing | |
| * a sound, etc. | |
| * | |
| * @return True there was an assigned OnClickListener that was called, false | |
| * otherwise is returned. | |
| */ | |
| public boolean performClick() { | |
| final boolean result; | |
| final ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnClickListener != null) { | |
| playSoundEffect(SoundEffectConstants.CLICK); | |
| li.mOnClickListener.onClick(this); | |
| result = true; | |
| } else { | |
| result = false; | |
| } | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); | |
| return result; | |
| } | |
| /** | |
| * Directly call any attached OnClickListener. Unlike {@link #performClick()}, | |
| * this only calls the listener, and does not do any associated clicking | |
| * actions like reporting an accessibility event. | |
| * | |
| * @return True there was an assigned OnClickListener that was called, false | |
| * otherwise is returned. | |
| */ | |
| public boolean callOnClick() { | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnClickListener != null) { | |
| li.mOnClickListener.onClick(this); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the | |
| * OnLongClickListener did not consume the event. | |
| * | |
| * @return True if one of the above receivers consumed the event, false otherwise. | |
| */ | |
| public boolean performLongClick() { | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); | |
| boolean handled = false; | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnLongClickListener != null) { | |
| handled = li.mOnLongClickListener.onLongClick(View.this); | |
| } | |
| if (!handled) { | |
| handled = showContextMenu(); | |
| } | |
| if (handled) { | |
| performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); | |
| } | |
| return handled; | |
| } | |
| /** | |
| * Call this view's OnContextClickListener, if it is defined. | |
| * | |
| * @return True if there was an assigned OnContextClickListener that consumed the event, false | |
| * otherwise. | |
| */ | |
| public boolean performContextClick() { | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED); | |
| boolean handled = false; | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnContextClickListener != null) { | |
| handled = li.mOnContextClickListener.onContextClick(View.this); | |
| } | |
| if (handled) { | |
| performHapticFeedback(HapticFeedbackConstants.CONTEXT_CLICK); | |
| } | |
| return handled; | |
| } | |
| /** | |
| * Performs button-related actions during a touch down event. | |
| * | |
| * @param event The event. | |
| * @return True if the down was consumed. | |
| * | |
| * @hide | |
| */ | |
| protected boolean performButtonActionOnTouchDown(MotionEvent event) { | |
| if (event.getToolType(0) == MotionEvent.TOOL_TYPE_MOUSE && | |
| (event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { | |
| showContextMenu(event.getX(), event.getY(), event.getMetaState()); | |
| mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Bring up the context menu for this view. | |
| * | |
| * @return Whether a context menu was displayed. | |
| */ | |
| public boolean showContextMenu() { | |
| return getParent().showContextMenuForChild(this); | |
| } | |
| /** | |
| * Bring up the context menu for this view, referring to the item under the specified point. | |
| * | |
| * @param x The referenced x coordinate. | |
| * @param y The referenced y coordinate. | |
| * @param metaState The keyboard modifiers that were pressed. | |
| * @return Whether a context menu was displayed. | |
| * | |
| * @hide | |
| */ | |
| public boolean showContextMenu(float x, float y, int metaState) { | |
| return showContextMenu(); | |
| } | |
| /** | |
| * Start an action mode with the default type {@link ActionMode#TYPE_PRIMARY}. | |
| * | |
| * @param callback Callback that will control the lifecycle of the action mode | |
| * @return The new action mode if it is started, null otherwise | |
| * | |
| * @see ActionMode | |
| * @see #startActionMode(android.view.ActionMode.Callback, int) | |
| */ | |
| public ActionMode startActionMode(ActionMode.Callback callback) { | |
| return startActionMode(callback, ActionMode.TYPE_PRIMARY); | |
| } | |
| /** | |
| * Start an action mode with the given type. | |
| * | |
| * @param callback Callback that will control the lifecycle of the action mode | |
| * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. | |
| * @return The new action mode if it is started, null otherwise | |
| * | |
| * @see ActionMode | |
| */ | |
| public ActionMode startActionMode(ActionMode.Callback callback, int type) { | |
| ViewParent parent = getParent(); | |
| if (parent == null) return null; | |
| try { | |
| return parent.startActionModeForChild(this, callback, type); | |
| } catch (AbstractMethodError ame) { | |
| // Older implementations of custom views might not implement this. | |
| return parent.startActionModeForChild(this, callback); | |
| } | |
| } | |
| /** | |
| * Call {@link Context#startActivityForResult(String, Intent, int, Bundle)} for the View's | |
| * Context, creating a unique View identifier to retrieve the result. | |
| * | |
| * @param intent The Intent to be started. | |
| * @param requestCode The request code to use. | |
| * @hide | |
| */ | |
| public void startActivityForResult(Intent intent, int requestCode) { | |
| mStartActivityRequestWho = "@android:view:" + System.identityHashCode(this); | |
| getContext().startActivityForResult(mStartActivityRequestWho, intent, requestCode, null); | |
| } | |
| /** | |
| * If this View corresponds to the calling who, dispatches the activity result. | |
| * @param who The identifier for the targeted View to receive the result. | |
| * @param requestCode The integer request code originally supplied to | |
| * startActivityForResult(), allowing you to identify who this | |
| * result came from. | |
| * @param resultCode The integer result code returned by the child activity | |
| * through its setResult(). | |
| * @param data An Intent, which can return result data to the caller | |
| * (various data can be attached to Intent "extras"). | |
| * @return {@code true} if the activity result was dispatched. | |
| * @hide | |
| */ | |
| public boolean dispatchActivityResult( | |
| String who, int requestCode, int resultCode, Intent data) { | |
| if (mStartActivityRequestWho != null && mStartActivityRequestWho.equals(who)) { | |
| onActivityResult(requestCode, resultCode, data); | |
| mStartActivityRequestWho = null; | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Receive the result from a previous call to {@link #startActivityForResult(Intent, int)}. | |
| * | |
| * @param requestCode The integer request code originally supplied to | |
| * startActivityForResult(), allowing you to identify who this | |
| * result came from. | |
| * @param resultCode The integer result code returned by the child activity | |
| * through its setResult(). | |
| * @param data An Intent, which can return result data to the caller | |
| * (various data can be attached to Intent "extras"). | |
| * @hide | |
| */ | |
| public void onActivityResult(int requestCode, int resultCode, Intent data) { | |
| // Do nothing. | |
| } | |
| /** | |
| * Register a callback to be invoked when a hardware key is pressed in this view. | |
| * Key presses in software input methods will generally not trigger the methods of | |
| * this listener. | |
| * @param l the key listener to attach to this view | |
| */ | |
| public void setOnKeyListener(OnKeyListener l) { | |
| getListenerInfo().mOnKeyListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when a touch event is sent to this view. | |
| * @param l the touch listener to attach to this view | |
| */ | |
| public void setOnTouchListener(OnTouchListener l) { | |
| getListenerInfo().mOnTouchListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when a generic motion event is sent to this view. | |
| * @param l the generic motion listener to attach to this view | |
| */ | |
| public void setOnGenericMotionListener(OnGenericMotionListener l) { | |
| getListenerInfo().mOnGenericMotionListener = l; | |
| } | |
| /** | |
| * Register a callback to be invoked when a hover event is sent to this view. | |
| * @param l the hover listener to attach to this view | |
| */ | |
| public void setOnHoverListener(OnHoverListener l) { | |
| getListenerInfo().mOnHoverListener = l; | |
| } | |
| /** | |
| * Register a drag event listener callback object for this View. The parameter is | |
| * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a | |
| * View, the system calls the | |
| * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. | |
| * @param l An implementation of {@link android.view.View.OnDragListener}. | |
| */ | |
| public void setOnDragListener(OnDragListener l) { | |
| getListenerInfo().mOnDragListener = l; | |
| } | |
| /** | |
| * Give this view focus. This will cause | |
| * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. | |
| * | |
| * Note: this does not check whether this {@link View} should get focus, it just | |
| * gives it focus no matter what. It should only be called internally by framework | |
| * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. | |
| * | |
| * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, | |
| * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which | |
| * focus moved when requestFocus() is called. It may not always | |
| * apply, in which case use the default View.FOCUS_DOWN. | |
| * @param previouslyFocusedRect The rectangle of the view that had focus | |
| * prior in this View's coordinate system. | |
| */ | |
| void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { | |
| if (DBG) { | |
| System.out.println(this + " requestFocus()"); | |
| } | |
| if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { | |
| mPrivateFlags |= PFLAG_FOCUSED; | |
| View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; | |
| if (mParent != null) { | |
| mParent.requestChildFocus(this, this); | |
| } | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); | |
| } | |
| onFocusChanged(true, direction, previouslyFocusedRect); | |
| refreshDrawableState(); | |
| } | |
| } | |
| /** | |
| * Populates <code>outRect</code> with the hotspot bounds. By default, | |
| * the hotspot bounds are identical to the screen bounds. | |
| * | |
| * @param outRect rect to populate with hotspot bounds | |
| * @hide Only for internal use by views and widgets. | |
| */ | |
| public void getHotspotBounds(Rect outRect) { | |
| final Drawable background = getBackground(); | |
| if (background != null) { | |
| background.getHotspotBounds(outRect); | |
| } else { | |
| getBoundsOnScreen(outRect); | |
| } | |
| } | |
| /** | |
| * Request that a rectangle of this view be visible on the screen, | |
| * scrolling if necessary just enough. | |
| * | |
| * <p>A View should call this if it maintains some notion of which part | |
| * of its content is interesting. For example, a text editing view | |
| * should call this when its cursor moves. | |
| * | |
| * @param rectangle The rectangle. | |
| * @return Whether any parent scrolled. | |
| */ | |
| public boolean requestRectangleOnScreen(Rect rectangle) { | |
| return requestRectangleOnScreen(rectangle, false); | |
| } | |
| /** | |
| * Request that a rectangle of this view be visible on the screen, | |
| * scrolling if necessary just enough. | |
| * | |
| * <p>A View should call this if it maintains some notion of which part | |
| * of its content is interesting. For example, a text editing view | |
| * should call this when its cursor moves. | |
| * | |
| * <p>When <code>immediate</code> is set to true, scrolling will not be | |
| * animated. | |
| * | |
| * @param rectangle The rectangle. | |
| * @param immediate True to forbid animated scrolling, false otherwise | |
| * @return Whether any parent scrolled. | |
| */ | |
| public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { | |
| if (mParent == null) { | |
| return false; | |
| } | |
| View child = this; | |
| RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); | |
| position.set(rectangle); | |
| ViewParent parent = mParent; | |
| boolean scrolled = false; | |
| while (parent != null) { | |
| rectangle.set((int) position.left, (int) position.top, | |
| (int) position.right, (int) position.bottom); | |
| scrolled |= parent.requestChildRectangleOnScreen(child, | |
| rectangle, immediate); | |
| if (!child.hasIdentityMatrix()) { | |
| child.getMatrix().mapRect(position); | |
| } | |
| position.offset(child.mLeft, child.mTop); | |
| if (!(parent instanceof View)) { | |
| break; | |
| } | |
| View parentView = (View) parent; | |
| position.offset(-parentView.getScrollX(), -parentView.getScrollY()); | |
| child = parentView; | |
| parent = child.getParent(); | |
| } | |
| return scrolled; | |
| } | |
| /** | |
| * Called when this view wants to give up focus. If focus is cleared | |
| * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. | |
| * <p> | |
| * <strong>Note:</strong> When a View clears focus the framework is trying | |
| * to give focus to the first focusable View from the top. Hence, if this | |
| * View is the first from the top that can take focus, then all callbacks | |
| * related to clearing focus will be invoked after which the framework will | |
| * give focus to this view. | |
| * </p> | |
| */ | |
| public void clearFocus() { | |
| if (DBG) { | |
| System.out.println(this + " clearFocus()"); | |
| } | |
| clearFocusInternal(null, true, true); | |
| } | |
| /** | |
| * Clears focus from the view, optionally propagating the change up through | |
| * the parent hierarchy and requesting that the root view place new focus. | |
| * | |
| * @param propagate whether to propagate the change up through the parent | |
| * hierarchy | |
| * @param refocus when propagate is true, specifies whether to request the | |
| * root view place new focus | |
| */ | |
| void clearFocusInternal(View focused, boolean propagate, boolean refocus) { | |
| if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { | |
| mPrivateFlags &= ~PFLAG_FOCUSED; | |
| if (propagate && mParent != null) { | |
| mParent.clearChildFocus(this); | |
| } | |
| onFocusChanged(false, 0, null); | |
| refreshDrawableState(); | |
| if (propagate && (!refocus || !rootViewRequestFocus())) { | |
| notifyGlobalFocusCleared(this); | |
| } | |
| } | |
| } | |
| void notifyGlobalFocusCleared(View oldFocus) { | |
| if (oldFocus != null && mAttachInfo != null) { | |
| mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); | |
| } | |
| } | |
| boolean rootViewRequestFocus() { | |
| final View root = getRootView(); | |
| return root != null && root.requestFocus(); | |
| } | |
| /** | |
| * Called internally by the view system when a new view is getting focus. | |
| * This is what clears the old focus. | |
| * <p> | |
| * <b>NOTE:</b> The parent view's focused child must be updated manually | |
| * after calling this method. Otherwise, the view hierarchy may be left in | |
| * an inconstent state. | |
| */ | |
| void unFocus(View focused) { | |
| if (DBG) { | |
| System.out.println(this + " unFocus()"); | |
| } | |
| clearFocusInternal(focused, false, false); | |
| } | |
| /** | |
| * Returns true if this view has focus itself, or is the ancestor of the | |
| * view that has focus. | |
| * | |
| * @return True if this view has or contains focus, false otherwise. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "focus") | |
| public boolean hasFocus() { | |
| return (mPrivateFlags & PFLAG_FOCUSED) != 0; | |
| } | |
| /** | |
| * Returns true if this view is focusable or if it contains a reachable View | |
| * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" | |
| * is a View whose parents do not block descendants focus. | |
| * | |
| * Only {@link #VISIBLE} views are considered focusable. | |
| * | |
| * @return True if the view is focusable or if the view contains a focusable | |
| * View, false otherwise. | |
| * | |
| * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS | |
| * @see ViewGroup#getTouchscreenBlocksFocus() | |
| */ | |
| public boolean hasFocusable() { | |
| if (!isFocusableInTouchMode()) { | |
| for (ViewParent p = mParent; p instanceof ViewGroup; p = p.getParent()) { | |
| final ViewGroup g = (ViewGroup) p; | |
| if (g.shouldBlockFocusForTouchscreen()) { | |
| return false; | |
| } | |
| } | |
| } | |
| return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); | |
| } | |
| /** | |
| * Called by the view system when the focus state of this view changes. | |
| * When the focus change event is caused by directional navigation, direction | |
| * and previouslyFocusedRect provide insight into where the focus is coming from. | |
| * When overriding, be sure to call up through to the super class so that | |
| * the standard focus handling will occur. | |
| * | |
| * @param gainFocus True if the View has focus; false otherwise. | |
| * @param direction The direction focus has moved when requestFocus() | |
| * is called to give this view focus. Values are | |
| * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, | |
| * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. | |
| * It may not always apply, in which case use the default. | |
| * @param previouslyFocusedRect The rectangle, in this view's coordinate | |
| * system, of the previously focused view. If applicable, this will be | |
| * passed in as finer grained information about where the focus is coming | |
| * from (in addition to direction). Will be <code>null</code> otherwise. | |
| */ | |
| @CallSuper | |
| protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, | |
| @Nullable Rect previouslyFocusedRect) { | |
| if (gainFocus) { | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); | |
| } else { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| InputMethodManager imm = InputMethodManager.peekInstance(); | |
| if (!gainFocus) { | |
| if (isPressed()) { | |
| setPressed(false); | |
| } | |
| if (imm != null && mAttachInfo != null | |
| && mAttachInfo.mHasWindowFocus) { | |
| imm.focusOut(this); | |
| } | |
| onFocusLost(); | |
| } else if (imm != null && mAttachInfo != null | |
| && mAttachInfo.mHasWindowFocus) { | |
| imm.focusIn(this); | |
| } | |
| invalidate(true); | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnFocusChangeListener != null) { | |
| li.mOnFocusChangeListener.onFocusChange(this, gainFocus); | |
| } | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mKeyDispatchState.reset(this); | |
| } | |
| } | |
| /** | |
| * Sends an accessibility event of the given type. If accessibility is | |
| * not enabled this method has no effect. The default implementation calls | |
| * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first | |
| * to populate information about the event source (this View), then calls | |
| * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to | |
| * populate the text content of the event source including its descendants, | |
| * and last calls | |
| * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} | |
| * on its parent to request sending of the event to interested parties. | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is | |
| * responsible for handling this call. | |
| * </p> | |
| * | |
| * @param eventType The type of the event to send, as defined by several types from | |
| * {@link android.view.accessibility.AccessibilityEvent}, such as | |
| * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or | |
| * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. | |
| * | |
| * @see #onInitializeAccessibilityEvent(AccessibilityEvent) | |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) | |
| * @see AccessibilityDelegate | |
| */ | |
| public void sendAccessibilityEvent(int eventType) { | |
| if (mAccessibilityDelegate != null) { | |
| mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); | |
| } else { | |
| sendAccessibilityEventInternal(eventType); | |
| } | |
| } | |
| /** | |
| * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} | |
| * {@link AccessibilityEvent} to make an announcement which is related to some | |
| * sort of a context change for which none of the events representing UI transitions | |
| * is a good fit. For example, announcing a new page in a book. If accessibility | |
| * is not enabled this method does nothing. | |
| * | |
| * @param text The announcement text. | |
| */ | |
| public void announceForAccessibility(CharSequence text) { | |
| if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { | |
| AccessibilityEvent event = AccessibilityEvent.obtain( | |
| AccessibilityEvent.TYPE_ANNOUNCEMENT); | |
| onInitializeAccessibilityEvent(event); | |
| event.getText().add(text); | |
| event.setContentDescription(null); | |
| mParent.requestSendAccessibilityEvent(this, event); | |
| } | |
| } | |
| /** | |
| * @see #sendAccessibilityEvent(int) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public void sendAccessibilityEventInternal(int eventType) { | |
| if (AccessibilityManager.getInstance(mContext).isEnabled()) { | |
| sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); | |
| } | |
| } | |
| /** | |
| * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but | |
| * takes as an argument an empty {@link AccessibilityEvent} and does not | |
| * perform a check whether accessibility is enabled. | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * | |
| * @param event The event to send. | |
| * | |
| * @see #sendAccessibilityEvent(int) | |
| */ | |
| public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { | |
| if (mAccessibilityDelegate != null) { | |
| mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); | |
| } else { | |
| sendAccessibilityEventUncheckedInternal(event); | |
| } | |
| } | |
| /** | |
| * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { | |
| if (!isShown()) { | |
| return; | |
| } | |
| onInitializeAccessibilityEvent(event); | |
| // Only a subset of accessibility events populates text content. | |
| if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { | |
| dispatchPopulateAccessibilityEvent(event); | |
| } | |
| // In the beginning we called #isShown(), so we know that getParent() is not null. | |
| getParent().requestSendAccessibilityEvent(this, event); | |
| } | |
| /** | |
| * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then | |
| * to its children for adding their text content to the event. Note that the | |
| * event text is populated in a separate dispatch path since we add to the | |
| * event not only the text of the source but also the text of all its descendants. | |
| * A typical implementation will call | |
| * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view | |
| * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} | |
| * on each child. Override this method if custom population of the event text | |
| * content is required. | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * <p> | |
| * <em>Note:</em> Accessibility events of certain types are not dispatched for | |
| * populating the event text via this method. For details refer to {@link AccessibilityEvent}. | |
| * </p> | |
| * | |
| * @param event The event. | |
| * | |
| * @return True if the event population was completed. | |
| */ | |
| public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { | |
| if (mAccessibilityDelegate != null) { | |
| return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); | |
| } else { | |
| return dispatchPopulateAccessibilityEventInternal(event); | |
| } | |
| } | |
| /** | |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { | |
| onPopulateAccessibilityEvent(event); | |
| return false; | |
| } | |
| /** | |
| * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} | |
| * giving a chance to this View to populate the accessibility event with its | |
| * text content. While this method is free to modify event | |
| * attributes other than text content, doing so should normally be performed in | |
| * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. | |
| * <p> | |
| * Example: Adding formatted date string to an accessibility event in addition | |
| * to the text added by the super implementation: | |
| * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { | |
| * super.onPopulateAccessibilityEvent(event); | |
| * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; | |
| * String selectedDateUtterance = DateUtils.formatDateTime(mContext, | |
| * mCurrentDate.getTimeInMillis(), flags); | |
| * event.getText().add(selectedDateUtterance); | |
| * }</pre> | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * <p class="note"><strong>Note:</strong> Always call the super implementation before adding | |
| * information to the event, in case the default implementation has basic information to add. | |
| * </p> | |
| * | |
| * @param event The accessibility event which to populate. | |
| * | |
| * @see #sendAccessibilityEvent(int) | |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| */ | |
| @CallSuper | |
| public void onPopulateAccessibilityEvent(AccessibilityEvent event) { | |
| if (mAccessibilityDelegate != null) { | |
| mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); | |
| } else { | |
| onPopulateAccessibilityEventInternal(event); | |
| } | |
| } | |
| /** | |
| * @see #onPopulateAccessibilityEvent(AccessibilityEvent) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { | |
| } | |
| /** | |
| * Initializes an {@link AccessibilityEvent} with information about | |
| * this View which is the event source. In other words, the source of | |
| * an accessibility event is the view whose state change triggered firing | |
| * the event. | |
| * <p> | |
| * Example: Setting the password property of an event in addition | |
| * to properties set by the super implementation: | |
| * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { | |
| * super.onInitializeAccessibilityEvent(event); | |
| * event.setPassword(true); | |
| * }</pre> | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * <p class="note"><strong>Note:</strong> Always call the super implementation before adding | |
| * information to the event, in case the default implementation has basic information to add. | |
| * </p> | |
| * @param event The event to initialize. | |
| * | |
| * @see #sendAccessibilityEvent(int) | |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| */ | |
| @CallSuper | |
| public void onInitializeAccessibilityEvent(AccessibilityEvent event) { | |
| if (mAccessibilityDelegate != null) { | |
| mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); | |
| } else { | |
| onInitializeAccessibilityEventInternal(event); | |
| } | |
| } | |
| /** | |
| * @see #onInitializeAccessibilityEvent(AccessibilityEvent) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { | |
| event.setSource(this); | |
| event.setClassName(getAccessibilityClassName()); | |
| event.setPackageName(getContext().getPackageName()); | |
| event.setEnabled(isEnabled()); | |
| event.setContentDescription(mContentDescription); | |
| switch (event.getEventType()) { | |
| case AccessibilityEvent.TYPE_VIEW_FOCUSED: { | |
| ArrayList<View> focusablesTempList = (mAttachInfo != null) | |
| ? mAttachInfo.mTempArrayList : new ArrayList<View>(); | |
| getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); | |
| event.setItemCount(focusablesTempList.size()); | |
| event.setCurrentItemIndex(focusablesTempList.indexOf(this)); | |
| if (mAttachInfo != null) { | |
| focusablesTempList.clear(); | |
| } | |
| } break; | |
| case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text != null && text.length() > 0) { | |
| event.setFromIndex(getAccessibilitySelectionStart()); | |
| event.setToIndex(getAccessibilitySelectionEnd()); | |
| event.setItemCount(text.length()); | |
| } | |
| } break; | |
| } | |
| } | |
| /** | |
| * Returns an {@link AccessibilityNodeInfo} representing this view from the | |
| * point of view of an {@link android.accessibilityservice.AccessibilityService}. | |
| * This method is responsible for obtaining an accessibility node info from a | |
| * pool of reusable instances and calling | |
| * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to | |
| * initialize the former. | |
| * <p> | |
| * Note: The client is responsible for recycling the obtained instance by calling | |
| * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. | |
| * </p> | |
| * | |
| * @return A populated {@link AccessibilityNodeInfo}. | |
| * | |
| * @see AccessibilityNodeInfo | |
| */ | |
| public AccessibilityNodeInfo createAccessibilityNodeInfo() { | |
| if (mAccessibilityDelegate != null) { | |
| return mAccessibilityDelegate.createAccessibilityNodeInfo(this); | |
| } else { | |
| return createAccessibilityNodeInfoInternal(); | |
| } | |
| } | |
| /** | |
| * @see #createAccessibilityNodeInfo() | |
| * | |
| * @hide | |
| */ | |
| public AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { | |
| AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); | |
| if (provider != null) { | |
| return provider.createAccessibilityNodeInfo(AccessibilityNodeProvider.HOST_VIEW_ID); | |
| } else { | |
| AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); | |
| onInitializeAccessibilityNodeInfo(info); | |
| return info; | |
| } | |
| } | |
| /** | |
| * Initializes an {@link AccessibilityNodeInfo} with information about this view. | |
| * The base implementation sets: | |
| * <ul> | |
| * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> | |
| * <li>{@link AccessibilityNodeInfo#setContextClickable(boolean)}</li> | |
| * </ul> | |
| * <p> | |
| * Subclasses should override this method, call the super implementation, | |
| * and set additional attributes. | |
| * </p> | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * | |
| * @param info The instance to initialize. | |
| */ | |
| @CallSuper | |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { | |
| if (mAccessibilityDelegate != null) { | |
| mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); | |
| } else { | |
| onInitializeAccessibilityNodeInfoInternal(info); | |
| } | |
| } | |
| /** | |
| * Gets the location of this view in screen coordinates. | |
| * | |
| * @param outRect The output location | |
| * @hide | |
| */ | |
| public void getBoundsOnScreen(Rect outRect) { | |
| getBoundsOnScreen(outRect, false); | |
| } | |
| /** | |
| * Gets the location of this view in screen coordinates. | |
| * | |
| * @param outRect The output location | |
| * @param clipToParent Whether to clip child bounds to the parent ones. | |
| * @hide | |
| */ | |
| public void getBoundsOnScreen(Rect outRect, boolean clipToParent) { | |
| if (mAttachInfo == null) { | |
| return; | |
| } | |
| RectF position = mAttachInfo.mTmpTransformRect; | |
| position.set(0, 0, mRight - mLeft, mBottom - mTop); | |
| if (!hasIdentityMatrix()) { | |
| getMatrix().mapRect(position); | |
| } | |
| position.offset(mLeft, mTop); | |
| ViewParent parent = mParent; | |
| while (parent instanceof View) { | |
| View parentView = (View) parent; | |
| position.offset(-parentView.mScrollX, -parentView.mScrollY); | |
| if (clipToParent) { | |
| position.left = Math.max(position.left, 0); | |
| position.top = Math.max(position.top, 0); | |
| position.right = Math.min(position.right, parentView.getWidth()); | |
| position.bottom = Math.min(position.bottom, parentView.getHeight()); | |
| } | |
| if (!parentView.hasIdentityMatrix()) { | |
| parentView.getMatrix().mapRect(position); | |
| } | |
| position.offset(parentView.mLeft, parentView.mTop); | |
| parent = parentView.mParent; | |
| } | |
| if (parent instanceof ViewRootImpl) { | |
| ViewRootImpl viewRootImpl = (ViewRootImpl) parent; | |
| position.offset(0, -viewRootImpl.mCurScrollY); | |
| } | |
| position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); | |
| outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), | |
| (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); | |
| } | |
| /** | |
| * Return the class name of this object to be used for accessibility purposes. | |
| * Subclasses should only override this if they are implementing something that | |
| * should be seen as a completely new class of view when used by accessibility, | |
| * unrelated to the class it is deriving from. This is used to fill in | |
| * {@link AccessibilityNodeInfo#setClassName AccessibilityNodeInfo.setClassName}. | |
| */ | |
| public CharSequence getAccessibilityClassName() { | |
| return View.class.getName(); | |
| } | |
| /** | |
| * Called when assist structure is being retrieved from a view as part of | |
| * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData}. | |
| * @param structure Fill in with structured view data. The default implementation | |
| * fills in all data that can be inferred from the view itself. | |
| */ | |
| public void onProvideStructure(ViewStructure structure) { | |
| final int id = mID; | |
| if (id > 0 && (id&0xff000000) != 0 && (id&0x00ff0000) != 0 | |
| && (id&0x0000ffff) != 0) { | |
| String pkg, type, entry; | |
| try { | |
| final Resources res = getResources(); | |
| entry = res.getResourceEntryName(id); | |
| type = res.getResourceTypeName(id); | |
| pkg = res.getResourcePackageName(id); | |
| } catch (Resources.NotFoundException e) { | |
| entry = type = pkg = null; | |
| } | |
| structure.setId(id, pkg, type, entry); | |
| } else { | |
| structure.setId(id, null, null, null); | |
| } | |
| structure.setDimens(mLeft, mTop, mScrollX, mScrollY, mRight - mLeft, mBottom - mTop); | |
| if (!hasIdentityMatrix()) { | |
| structure.setTransformation(getMatrix()); | |
| } | |
| structure.setElevation(getZ()); | |
| structure.setVisibility(getVisibility()); | |
| structure.setEnabled(isEnabled()); | |
| if (isClickable()) { | |
| structure.setClickable(true); | |
| } | |
| if (isFocusable()) { | |
| structure.setFocusable(true); | |
| } | |
| if (isFocused()) { | |
| structure.setFocused(true); | |
| } | |
| if (isAccessibilityFocused()) { | |
| structure.setAccessibilityFocused(true); | |
| } | |
| if (isSelected()) { | |
| structure.setSelected(true); | |
| } | |
| if (isActivated()) { | |
| structure.setActivated(true); | |
| } | |
| if (isLongClickable()) { | |
| structure.setLongClickable(true); | |
| } | |
| if (this instanceof Checkable) { | |
| structure.setCheckable(true); | |
| if (((Checkable)this).isChecked()) { | |
| structure.setChecked(true); | |
| } | |
| } | |
| if (isContextClickable()) { | |
| structure.setContextClickable(true); | |
| } | |
| structure.setClassName(getAccessibilityClassName().toString()); | |
| structure.setContentDescription(getContentDescription()); | |
| } | |
| /** | |
| * Called when assist structure is being retrieved from a view as part of | |
| * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData} to | |
| * generate additional virtual structure under this view. The defaullt implementation | |
| * uses {@link #getAccessibilityNodeProvider()} to try to generate this from the | |
| * view's virtual accessibility nodes, if any. You can override this for a more | |
| * optimal implementation providing this data. | |
| */ | |
| public void onProvideVirtualStructure(ViewStructure structure) { | |
| AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); | |
| if (provider != null) { | |
| AccessibilityNodeInfo info = createAccessibilityNodeInfo(); | |
| structure.setChildCount(1); | |
| ViewStructure root = structure.newChild(0); | |
| populateVirtualStructure(root, provider, info); | |
| info.recycle(); | |
| } | |
| } | |
| private void populateVirtualStructure(ViewStructure structure, | |
| AccessibilityNodeProvider provider, AccessibilityNodeInfo info) { | |
| structure.setId(AccessibilityNodeInfo.getVirtualDescendantId(info.getSourceNodeId()), | |
| null, null, null); | |
| Rect rect = structure.getTempRect(); | |
| info.getBoundsInParent(rect); | |
| structure.setDimens(rect.left, rect.top, 0, 0, rect.width(), rect.height()); | |
| structure.setVisibility(VISIBLE); | |
| structure.setEnabled(info.isEnabled()); | |
| if (info.isClickable()) { | |
| structure.setClickable(true); | |
| } | |
| if (info.isFocusable()) { | |
| structure.setFocusable(true); | |
| } | |
| if (info.isFocused()) { | |
| structure.setFocused(true); | |
| } | |
| if (info.isAccessibilityFocused()) { | |
| structure.setAccessibilityFocused(true); | |
| } | |
| if (info.isSelected()) { | |
| structure.setSelected(true); | |
| } | |
| if (info.isLongClickable()) { | |
| structure.setLongClickable(true); | |
| } | |
| if (info.isCheckable()) { | |
| structure.setCheckable(true); | |
| if (info.isChecked()) { | |
| structure.setChecked(true); | |
| } | |
| } | |
| if (info.isContextClickable()) { | |
| structure.setContextClickable(true); | |
| } | |
| CharSequence cname = info.getClassName(); | |
| structure.setClassName(cname != null ? cname.toString() : null); | |
| structure.setContentDescription(info.getContentDescription()); | |
| if (info.getText() != null || info.getError() != null) { | |
| structure.setText(info.getText(), info.getTextSelectionStart(), | |
| info.getTextSelectionEnd()); | |
| } | |
| final int NCHILDREN = info.getChildCount(); | |
| if (NCHILDREN > 0) { | |
| structure.setChildCount(NCHILDREN); | |
| for (int i=0; i<NCHILDREN; i++) { | |
| AccessibilityNodeInfo cinfo = provider.createAccessibilityNodeInfo( | |
| AccessibilityNodeInfo.getVirtualDescendantId(info.getChildId(i))); | |
| ViewStructure child = structure.newChild(i); | |
| populateVirtualStructure(child, provider, cinfo); | |
| cinfo.recycle(); | |
| } | |
| } | |
| } | |
| /** | |
| * Dispatch creation of {@link ViewStructure} down the hierarchy. The default | |
| * implementation calls {@link #onProvideStructure} and | |
| * {@link #onProvideVirtualStructure}. | |
| */ | |
| public void dispatchProvideStructure(ViewStructure structure) { | |
| if (!isAssistBlocked()) { | |
| onProvideStructure(structure); | |
| onProvideVirtualStructure(structure); | |
| } else { | |
| structure.setClassName(getAccessibilityClassName().toString()); | |
| structure.setAssistBlocked(true); | |
| } | |
| } | |
| /** | |
| * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { | |
| if (mAttachInfo == null) { | |
| return; | |
| } | |
| Rect bounds = mAttachInfo.mTmpInvalRect; | |
| getDrawingRect(bounds); | |
| info.setBoundsInParent(bounds); | |
| getBoundsOnScreen(bounds, true); | |
| info.setBoundsInScreen(bounds); | |
| ViewParent parent = getParentForAccessibility(); | |
| if (parent instanceof View) { | |
| info.setParent((View) parent); | |
| } | |
| if (mID != View.NO_ID) { | |
| View rootView = getRootView(); | |
| if (rootView == null) { | |
| rootView = this; | |
| } | |
| View label = rootView.findLabelForView(this, mID); | |
| if (label != null) { | |
| info.setLabeledBy(label); | |
| } | |
| if ((mAttachInfo.mAccessibilityFetchFlags | |
| & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 | |
| && Resources.resourceHasPackage(mID)) { | |
| try { | |
| String viewId = getResources().getResourceName(mID); | |
| info.setViewIdResourceName(viewId); | |
| } catch (Resources.NotFoundException nfe) { | |
| /* ignore */ | |
| } | |
| } | |
| } | |
| if (mLabelForId != View.NO_ID) { | |
| View rootView = getRootView(); | |
| if (rootView == null) { | |
| rootView = this; | |
| } | |
| View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); | |
| if (labeled != null) { | |
| info.setLabelFor(labeled); | |
| } | |
| } | |
| if (mAccessibilityTraversalBeforeId != View.NO_ID) { | |
| View rootView = getRootView(); | |
| if (rootView == null) { | |
| rootView = this; | |
| } | |
| View next = rootView.findViewInsideOutShouldExist(this, | |
| mAccessibilityTraversalBeforeId); | |
| if (next != null && next.includeForAccessibility()) { | |
| info.setTraversalBefore(next); | |
| } | |
| } | |
| if (mAccessibilityTraversalAfterId != View.NO_ID) { | |
| View rootView = getRootView(); | |
| if (rootView == null) { | |
| rootView = this; | |
| } | |
| View next = rootView.findViewInsideOutShouldExist(this, | |
| mAccessibilityTraversalAfterId); | |
| if (next != null && next.includeForAccessibility()) { | |
| info.setTraversalAfter(next); | |
| } | |
| } | |
| info.setVisibleToUser(isVisibleToUser()); | |
| info.setPackageName(mContext.getPackageName()); | |
| info.setClassName(getAccessibilityClassName()); | |
| info.setContentDescription(getContentDescription()); | |
| info.setEnabled(isEnabled()); | |
| info.setClickable(isClickable()); | |
| info.setFocusable(isFocusable()); | |
| info.setFocused(isFocused()); | |
| info.setAccessibilityFocused(isAccessibilityFocused()); | |
| info.setSelected(isSelected()); | |
| info.setLongClickable(isLongClickable()); | |
| info.setContextClickable(isContextClickable()); | |
| info.setLiveRegion(getAccessibilityLiveRegion()); | |
| // TODO: These make sense only if we are in an AdapterView but all | |
| // views can be selected. Maybe from accessibility perspective | |
| // we should report as selectable view in an AdapterView. | |
| info.addAction(AccessibilityNodeInfo.ACTION_SELECT); | |
| info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); | |
| if (isFocusable()) { | |
| if (isFocused()) { | |
| info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); | |
| } else { | |
| info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); | |
| } | |
| } | |
| if (!isAccessibilityFocused()) { | |
| info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); | |
| } else { | |
| info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); | |
| } | |
| if (isClickable() && isEnabled()) { | |
| info.addAction(AccessibilityNodeInfo.ACTION_CLICK); | |
| } | |
| if (isLongClickable() && isEnabled()) { | |
| info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); | |
| } | |
| if (isContextClickable() && isEnabled()) { | |
| info.addAction(AccessibilityAction.ACTION_CONTEXT_CLICK); | |
| } | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text != null && text.length() > 0) { | |
| info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); | |
| info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); | |
| info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); | |
| info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); | |
| info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER | |
| | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD | |
| | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); | |
| } | |
| info.addAction(AccessibilityAction.ACTION_SHOW_ON_SCREEN); | |
| } | |
| private View findLabelForView(View view, int labeledId) { | |
| if (mMatchLabelForPredicate == null) { | |
| mMatchLabelForPredicate = new MatchLabelForPredicate(); | |
| } | |
| mMatchLabelForPredicate.mLabeledId = labeledId; | |
| return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); | |
| } | |
| /** | |
| * Computes whether this view is visible to the user. Such a view is | |
| * attached, visible, all its predecessors are visible, it is not clipped | |
| * entirely by its predecessors, and has an alpha greater than zero. | |
| * | |
| * @return Whether the view is visible on the screen. | |
| * | |
| * @hide | |
| */ | |
| protected boolean isVisibleToUser() { | |
| return isVisibleToUser(null); | |
| } | |
| /** | |
| * Computes whether the given portion of this view is visible to the user. | |
| * Such a view is attached, visible, all its predecessors are visible, | |
| * has an alpha greater than zero, and the specified portion is not | |
| * clipped entirely by its predecessors. | |
| * | |
| * @param boundInView the portion of the view to test; coordinates should be relative; may be | |
| * <code>null</code>, and the entire view will be tested in this case. | |
| * When <code>true</code> is returned by the function, the actual visible | |
| * region will be stored in this parameter; that is, if boundInView is fully | |
| * contained within the view, no modification will be made, otherwise regions | |
| * outside of the visible area of the view will be clipped. | |
| * | |
| * @return Whether the specified portion of the view is visible on the screen. | |
| * | |
| * @hide | |
| */ | |
| protected boolean isVisibleToUser(Rect boundInView) { | |
| if (mAttachInfo != null) { | |
| // Attached to invisible window means this view is not visible. | |
| if (mAttachInfo.mWindowVisibility != View.VISIBLE) { | |
| return false; | |
| } | |
| // An invisible predecessor or one with alpha zero means | |
| // that this view is not visible to the user. | |
| Object current = this; | |
| while (current instanceof View) { | |
| View view = (View) current; | |
| // We have attach info so this view is attached and there is no | |
| // need to check whether we reach to ViewRootImpl on the way up. | |
| if (view.getAlpha() <= 0 || view.getTransitionAlpha() <= 0 || | |
| view.getVisibility() != VISIBLE) { | |
| return false; | |
| } | |
| current = view.mParent; | |
| } | |
| // Check if the view is entirely covered by its predecessors. | |
| Rect visibleRect = mAttachInfo.mTmpInvalRect; | |
| Point offset = mAttachInfo.mPoint; | |
| if (!getGlobalVisibleRect(visibleRect, offset)) { | |
| return false; | |
| } | |
| // Check if the visible portion intersects the rectangle of interest. | |
| if (boundInView != null) { | |
| visibleRect.offset(-offset.x, -offset.y); | |
| return boundInView.intersect(visibleRect); | |
| } | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Returns the delegate for implementing accessibility support via | |
| * composition. For more details see {@link AccessibilityDelegate}. | |
| * | |
| * @return The delegate, or null if none set. | |
| * | |
| * @hide | |
| */ | |
| public AccessibilityDelegate getAccessibilityDelegate() { | |
| return mAccessibilityDelegate; | |
| } | |
| /** | |
| * Sets a delegate for implementing accessibility support via composition as | |
| * opposed to inheritance. The delegate's primary use is for implementing | |
| * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. | |
| * | |
| * @param delegate The delegate instance. | |
| * | |
| * @see AccessibilityDelegate | |
| */ | |
| public void setAccessibilityDelegate(@Nullable AccessibilityDelegate delegate) { | |
| mAccessibilityDelegate = delegate; | |
| } | |
| /** | |
| * Gets the provider for managing a virtual view hierarchy rooted at this View | |
| * and reported to {@link android.accessibilityservice.AccessibilityService}s | |
| * that explore the window content. | |
| * <p> | |
| * If this method returns an instance, this instance is responsible for managing | |
| * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this | |
| * View including the one representing the View itself. Similarly the returned | |
| * instance is responsible for performing accessibility actions on any virtual | |
| * view or the root view itself. | |
| * </p> | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * | |
| * @return The provider. | |
| * | |
| * @see AccessibilityNodeProvider | |
| */ | |
| public AccessibilityNodeProvider getAccessibilityNodeProvider() { | |
| if (mAccessibilityDelegate != null) { | |
| return mAccessibilityDelegate.getAccessibilityNodeProvider(this); | |
| } else { | |
| return null; | |
| } | |
| } | |
| /** | |
| * Gets the unique identifier of this view on the screen for accessibility purposes. | |
| * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. | |
| * | |
| * @return The view accessibility id. | |
| * | |
| * @hide | |
| */ | |
| public int getAccessibilityViewId() { | |
| if (mAccessibilityViewId == NO_ID) { | |
| mAccessibilityViewId = sNextAccessibilityViewId++; | |
| } | |
| return mAccessibilityViewId; | |
| } | |
| /** | |
| * Gets the unique identifier of the window in which this View reseides. | |
| * | |
| * @return The window accessibility id. | |
| * | |
| * @hide | |
| */ | |
| public int getAccessibilityWindowId() { | |
| return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId | |
| : AccessibilityNodeInfo.UNDEFINED_ITEM_ID; | |
| } | |
| /** | |
| * Gets the {@link View} description. It briefly describes the view and is | |
| * primarily used for accessibility support. Set this property to enable | |
| * better accessibility support for your application. This is especially | |
| * true for views that do not have textual representation (For example, | |
| * ImageButton). | |
| * | |
| * @return The content description. | |
| * | |
| * @attr ref android.R.styleable#View_contentDescription | |
| */ | |
| @ViewDebug.ExportedProperty(category = "accessibility") | |
| public CharSequence getContentDescription() { | |
| return mContentDescription; | |
| } | |
| /** | |
| * Sets the {@link View} description. It briefly describes the view and is | |
| * primarily used for accessibility support. Set this property to enable | |
| * better accessibility support for your application. This is especially | |
| * true for views that do not have textual representation (For example, | |
| * ImageButton). | |
| * | |
| * @param contentDescription The content description. | |
| * | |
| * @attr ref android.R.styleable#View_contentDescription | |
| */ | |
| @RemotableViewMethod | |
| public void setContentDescription(CharSequence contentDescription) { | |
| if (mContentDescription == null) { | |
| if (contentDescription == null) { | |
| return; | |
| } | |
| } else if (mContentDescription.equals(contentDescription)) { | |
| return; | |
| } | |
| mContentDescription = contentDescription; | |
| final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; | |
| if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { | |
| setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } else { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION); | |
| } | |
| } | |
| /** | |
| * Sets the id of a view before which this one is visited in accessibility traversal. | |
| * A screen-reader must visit the content of this view before the content of the one | |
| * it precedes. For example, if view B is set to be before view A, then a screen-reader | |
| * will traverse the entire content of B before traversing the entire content of A, | |
| * regardles of what traversal strategy it is using. | |
| * <p> | |
| * Views that do not have specified before/after relationships are traversed in order | |
| * determined by the screen-reader. | |
| * </p> | |
| * <p> | |
| * Setting that this view is before a view that is not important for accessibility | |
| * or if this view is not important for accessibility will have no effect as the | |
| * screen-reader is not aware of unimportant views. | |
| * </p> | |
| * | |
| * @param beforeId The id of a view this one precedes in accessibility traversal. | |
| * | |
| * @attr ref android.R.styleable#View_accessibilityTraversalBefore | |
| * | |
| * @see #setImportantForAccessibility(int) | |
| */ | |
| @RemotableViewMethod | |
| public void setAccessibilityTraversalBefore(int beforeId) { | |
| if (mAccessibilityTraversalBeforeId == beforeId) { | |
| return; | |
| } | |
| mAccessibilityTraversalBeforeId = beforeId; | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| /** | |
| * Gets the id of a view before which this one is visited in accessibility traversal. | |
| * | |
| * @return The id of a view this one precedes in accessibility traversal if | |
| * specified, otherwise {@link #NO_ID}. | |
| * | |
| * @see #setAccessibilityTraversalBefore(int) | |
| */ | |
| public int getAccessibilityTraversalBefore() { | |
| return mAccessibilityTraversalBeforeId; | |
| } | |
| /** | |
| * Sets the id of a view after which this one is visited in accessibility traversal. | |
| * A screen-reader must visit the content of the other view before the content of this | |
| * one. For example, if view B is set to be after view A, then a screen-reader | |
| * will traverse the entire content of A before traversing the entire content of B, | |
| * regardles of what traversal strategy it is using. | |
| * <p> | |
| * Views that do not have specified before/after relationships are traversed in order | |
| * determined by the screen-reader. | |
| * </p> | |
| * <p> | |
| * Setting that this view is after a view that is not important for accessibility | |
| * or if this view is not important for accessibility will have no effect as the | |
| * screen-reader is not aware of unimportant views. | |
| * </p> | |
| * | |
| * @param afterId The id of a view this one succedees in accessibility traversal. | |
| * | |
| * @attr ref android.R.styleable#View_accessibilityTraversalAfter | |
| * | |
| * @see #setImportantForAccessibility(int) | |
| */ | |
| @RemotableViewMethod | |
| public void setAccessibilityTraversalAfter(int afterId) { | |
| if (mAccessibilityTraversalAfterId == afterId) { | |
| return; | |
| } | |
| mAccessibilityTraversalAfterId = afterId; | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| /** | |
| * Gets the id of a view after which this one is visited in accessibility traversal. | |
| * | |
| * @return The id of a view this one succeedes in accessibility traversal if | |
| * specified, otherwise {@link #NO_ID}. | |
| * | |
| * @see #setAccessibilityTraversalAfter(int) | |
| */ | |
| public int getAccessibilityTraversalAfter() { | |
| return mAccessibilityTraversalAfterId; | |
| } | |
| /** | |
| * Gets the id of a view for which this view serves as a label for | |
| * accessibility purposes. | |
| * | |
| * @return The labeled view id. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "accessibility") | |
| public int getLabelFor() { | |
| return mLabelForId; | |
| } | |
| /** | |
| * Sets the id of a view for which this view serves as a label for | |
| * accessibility purposes. | |
| * | |
| * @param id The labeled view id. | |
| */ | |
| @RemotableViewMethod | |
| public void setLabelFor(@IdRes int id) { | |
| if (mLabelForId == id) { | |
| return; | |
| } | |
| mLabelForId = id; | |
| if (mLabelForId != View.NO_ID | |
| && mID == View.NO_ID) { | |
| mID = generateViewId(); | |
| } | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| /** | |
| * Invoked whenever this view loses focus, either by losing window focus or by losing | |
| * focus within its window. This method can be used to clear any state tied to the | |
| * focus. For instance, if a button is held pressed with the trackball and the window | |
| * loses focus, this method can be used to cancel the press. | |
| * | |
| * Subclasses of View overriding this method should always call super.onFocusLost(). | |
| * | |
| * @see #onFocusChanged(boolean, int, android.graphics.Rect) | |
| * @see #onWindowFocusChanged(boolean) | |
| * | |
| * @hide pending API council approval | |
| */ | |
| @CallSuper | |
| protected void onFocusLost() { | |
| resetPressedState(); | |
| } | |
| private void resetPressedState() { | |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { | |
| return; | |
| } | |
| if (isPressed()) { | |
| setPressed(false); | |
| if (!mHasPerformedLongPress) { | |
| removeLongPressCallback(); | |
| } | |
| } | |
| } | |
| /** | |
| * Returns true if this view has focus | |
| * | |
| * @return True if this view has focus, false otherwise. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "focus") | |
| public boolean isFocused() { | |
| return (mPrivateFlags & PFLAG_FOCUSED) != 0; | |
| } | |
| /** | |
| * Find the view in the hierarchy rooted at this view that currently has | |
| * focus. | |
| * | |
| * @return The view that currently has focus, or null if no focused view can | |
| * be found. | |
| */ | |
| public View findFocus() { | |
| return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; | |
| } | |
| /** | |
| * Indicates whether this view is one of the set of scrollable containers in | |
| * its window. | |
| * | |
| * @return whether this view is one of the set of scrollable containers in | |
| * its window | |
| * | |
| * @attr ref android.R.styleable#View_isScrollContainer | |
| */ | |
| public boolean isScrollContainer() { | |
| return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; | |
| } | |
| /** | |
| * Change whether this view is one of the set of scrollable containers in | |
| * its window. This will be used to determine whether the window can | |
| * resize or must pan when a soft input area is open -- scrollable | |
| * containers allow the window to use resize mode since the container | |
| * will appropriately shrink. | |
| * | |
| * @attr ref android.R.styleable#View_isScrollContainer | |
| */ | |
| public void setScrollContainer(boolean isScrollContainer) { | |
| if (isScrollContainer) { | |
| if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { | |
| mAttachInfo.mScrollContainers.add(this); | |
| mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; | |
| } | |
| mPrivateFlags |= PFLAG_SCROLL_CONTAINER; | |
| } else { | |
| if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { | |
| mAttachInfo.mScrollContainers.remove(this); | |
| } | |
| mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); | |
| } | |
| } | |
| /** | |
| * Returns the quality of the drawing cache. | |
| * | |
| * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, | |
| * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} | |
| * | |
| * @see #setDrawingCacheQuality(int) | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #isDrawingCacheEnabled() | |
| * | |
| * @attr ref android.R.styleable#View_drawingCacheQuality | |
| */ | |
| @DrawingCacheQuality | |
| public int getDrawingCacheQuality() { | |
| return mViewFlags & DRAWING_CACHE_QUALITY_MASK; | |
| } | |
| /** | |
| * Set the drawing cache quality of this view. This value is used only when the | |
| * drawing cache is enabled | |
| * | |
| * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, | |
| * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} | |
| * | |
| * @see #getDrawingCacheQuality() | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #isDrawingCacheEnabled() | |
| * | |
| * @attr ref android.R.styleable#View_drawingCacheQuality | |
| */ | |
| public void setDrawingCacheQuality(@DrawingCacheQuality int quality) { | |
| setFlags(quality, DRAWING_CACHE_QUALITY_MASK); | |
| } | |
| /** | |
| * Returns whether the screen should remain on, corresponding to the current | |
| * value of {@link #KEEP_SCREEN_ON}. | |
| * | |
| * @return Returns true if {@link #KEEP_SCREEN_ON} is set. | |
| * | |
| * @see #setKeepScreenOn(boolean) | |
| * | |
| * @attr ref android.R.styleable#View_keepScreenOn | |
| */ | |
| public boolean getKeepScreenOn() { | |
| return (mViewFlags & KEEP_SCREEN_ON) != 0; | |
| } | |
| /** | |
| * Controls whether the screen should remain on, modifying the | |
| * value of {@link #KEEP_SCREEN_ON}. | |
| * | |
| * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. | |
| * | |
| * @see #getKeepScreenOn() | |
| * | |
| * @attr ref android.R.styleable#View_keepScreenOn | |
| */ | |
| public void setKeepScreenOn(boolean keepScreenOn) { | |
| setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); | |
| } | |
| /** | |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. | |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusLeft | |
| */ | |
| public int getNextFocusLeftId() { | |
| return mNextFocusLeftId; | |
| } | |
| /** | |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. | |
| * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should | |
| * decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusLeft | |
| */ | |
| public void setNextFocusLeftId(int nextFocusLeftId) { | |
| mNextFocusLeftId = nextFocusLeftId; | |
| } | |
| /** | |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. | |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusRight | |
| */ | |
| public int getNextFocusRightId() { | |
| return mNextFocusRightId; | |
| } | |
| /** | |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. | |
| * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should | |
| * decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusRight | |
| */ | |
| public void setNextFocusRightId(int nextFocusRightId) { | |
| mNextFocusRightId = nextFocusRightId; | |
| } | |
| /** | |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. | |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusUp | |
| */ | |
| public int getNextFocusUpId() { | |
| return mNextFocusUpId; | |
| } | |
| /** | |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. | |
| * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should | |
| * decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusUp | |
| */ | |
| public void setNextFocusUpId(int nextFocusUpId) { | |
| mNextFocusUpId = nextFocusUpId; | |
| } | |
| /** | |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. | |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusDown | |
| */ | |
| public int getNextFocusDownId() { | |
| return mNextFocusDownId; | |
| } | |
| /** | |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. | |
| * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should | |
| * decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusDown | |
| */ | |
| public void setNextFocusDownId(int nextFocusDownId) { | |
| mNextFocusDownId = nextFocusDownId; | |
| } | |
| /** | |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. | |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusForward | |
| */ | |
| public int getNextFocusForwardId() { | |
| return mNextFocusForwardId; | |
| } | |
| /** | |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. | |
| * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should | |
| * decide automatically. | |
| * | |
| * @attr ref android.R.styleable#View_nextFocusForward | |
| */ | |
| public void setNextFocusForwardId(int nextFocusForwardId) { | |
| mNextFocusForwardId = nextFocusForwardId; | |
| } | |
| /** | |
| * Returns the visibility of this view and all of its ancestors | |
| * | |
| * @return True if this view and all of its ancestors are {@link #VISIBLE} | |
| */ | |
| public boolean isShown() { | |
| View current = this; | |
| //noinspection ConstantConditions | |
| do { | |
| if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { | |
| return false; | |
| } | |
| ViewParent parent = current.mParent; | |
| if (parent == null) { | |
| return false; // We are not attached to the view root | |
| } | |
| if (!(parent instanceof View)) { | |
| return true; | |
| } | |
| current = (View) parent; | |
| } while (current != null); | |
| return false; | |
| } | |
| /** | |
| * Called by the view hierarchy when the content insets for a window have | |
| * changed, to allow it to adjust its content to fit within those windows. | |
| * The content insets tell you the space that the status bar, input method, | |
| * and other system windows infringe on the application's window. | |
| * | |
| * <p>You do not normally need to deal with this function, since the default | |
| * window decoration given to applications takes care of applying it to the | |
| * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} | |
| * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, | |
| * and your content can be placed under those system elements. You can then | |
| * use this method within your view hierarchy if you have parts of your UI | |
| * which you would like to ensure are not being covered. | |
| * | |
| * <p>The default implementation of this method simply applies the content | |
| * insets to the view's padding, consuming that content (modifying the | |
| * insets to be 0), and returning true. This behavior is off by default, but can | |
| * be enabled through {@link #setFitsSystemWindows(boolean)}. | |
| * | |
| * <p>This function's traversal down the hierarchy is depth-first. The same content | |
| * insets object is propagated down the hierarchy, so any changes made to it will | |
| * be seen by all following views (including potentially ones above in | |
| * the hierarchy since this is a depth-first traversal). The first view | |
| * that returns true will abort the entire traversal. | |
| * | |
| * <p>The default implementation works well for a situation where it is | |
| * used with a container that covers the entire window, allowing it to | |
| * apply the appropriate insets to its content on all edges. If you need | |
| * a more complicated layout (such as two different views fitting system | |
| * windows, one on the top of the window, and one on the bottom), | |
| * you can override the method and handle the insets however you would like. | |
| * Note that the insets provided by the framework are always relative to the | |
| * far edges of the window, not accounting for the location of the called view | |
| * within that window. (In fact when this method is called you do not yet know | |
| * where the layout will place the view, as it is done before layout happens.) | |
| * | |
| * <p>Note: unlike many View methods, there is no dispatch phase to this | |
| * call. If you are overriding it in a ViewGroup and want to allow the | |
| * call to continue to your children, you must be sure to call the super | |
| * implementation. | |
| * | |
| * <p>Here is a sample layout that makes use of fitting system windows | |
| * to have controls for a video view placed inside of the window decorations | |
| * that it hides and shows. This can be used with code like the second | |
| * sample (video player) shown in {@link #setSystemUiVisibility(int)}. | |
| * | |
| * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} | |
| * | |
| * @param insets Current content insets of the window. Prior to | |
| * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify | |
| * the insets or else you and Android will be unhappy. | |
| * | |
| * @return {@code true} if this view applied the insets and it should not | |
| * continue propagating further down the hierarchy, {@code false} otherwise. | |
| * @see #getFitsSystemWindows() | |
| * @see #setFitsSystemWindows(boolean) | |
| * @see #setSystemUiVisibility(int) | |
| * | |
| * @deprecated As of API 20 use {@link #dispatchApplyWindowInsets(WindowInsets)} to apply | |
| * insets to views. Views should override {@link #onApplyWindowInsets(WindowInsets)} or use | |
| * {@link #setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)} | |
| * to implement handling their own insets. | |
| */ | |
| protected boolean fitSystemWindows(Rect insets) { | |
| if ((mPrivateFlags3 & PFLAG3_APPLYING_INSETS) == 0) { | |
| if (insets == null) { | |
| // Null insets by definition have already been consumed. | |
| // This call cannot apply insets since there are none to apply, | |
| // so return false. | |
| return false; | |
| } | |
| // If we're not in the process of dispatching the newer apply insets call, | |
| // that means we're not in the compatibility path. Dispatch into the newer | |
| // apply insets path and take things from there. | |
| try { | |
| mPrivateFlags3 |= PFLAG3_FITTING_SYSTEM_WINDOWS; | |
| return dispatchApplyWindowInsets(new WindowInsets(insets)).isConsumed(); | |
| } finally { | |
| mPrivateFlags3 &= ~PFLAG3_FITTING_SYSTEM_WINDOWS; | |
| } | |
| } else { | |
| // We're being called from the newer apply insets path. | |
| // Perform the standard fallback behavior. | |
| return fitSystemWindowsInt(insets); | |
| } | |
| } | |
| private boolean fitSystemWindowsInt(Rect insets) { | |
| if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { | |
| mUserPaddingStart = UNDEFINED_PADDING; | |
| mUserPaddingEnd = UNDEFINED_PADDING; | |
| Rect localInsets = sThreadLocal.get(); | |
| if (localInsets == null) { | |
| localInsets = new Rect(); | |
| sThreadLocal.set(localInsets); | |
| } | |
| boolean res = computeFitSystemWindows(insets, localInsets); | |
| mUserPaddingLeftInitial = localInsets.left; | |
| mUserPaddingRightInitial = localInsets.right; | |
| internalSetPadding(localInsets.left, localInsets.top, | |
| localInsets.right, localInsets.bottom); | |
| return res; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Called when the view should apply {@link WindowInsets} according to its internal policy. | |
| * | |
| * <p>This method should be overridden by views that wish to apply a policy different from or | |
| * in addition to the default behavior. Clients that wish to force a view subtree | |
| * to apply insets should call {@link #dispatchApplyWindowInsets(WindowInsets)}.</p> | |
| * | |
| * <p>Clients may supply an {@link OnApplyWindowInsetsListener} to a view. If one is set | |
| * it will be called during dispatch instead of this method. The listener may optionally | |
| * call this method from its own implementation if it wishes to apply the view's default | |
| * insets policy in addition to its own.</p> | |
| * | |
| * <p>Implementations of this method should either return the insets parameter unchanged | |
| * or a new {@link WindowInsets} cloned from the supplied insets with any insets consumed | |
| * that this view applied itself. This allows new inset types added in future platform | |
| * versions to pass through existing implementations unchanged without being erroneously | |
| * consumed.</p> | |
| * | |
| * <p>By default if a view's {@link #setFitsSystemWindows(boolean) fitsSystemWindows} | |
| * property is set then the view will consume the system window insets and apply them | |
| * as padding for the view.</p> | |
| * | |
| * @param insets Insets to apply | |
| * @return The supplied insets with any applied insets consumed | |
| */ | |
| public WindowInsets onApplyWindowInsets(WindowInsets insets) { | |
| if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { | |
| // We weren't called from within a direct call to fitSystemWindows, | |
| // call into it as a fallback in case we're in a class that overrides it | |
| // and has logic to perform. | |
| if (fitSystemWindows(insets.getSystemWindowInsets())) { | |
| return insets.consumeSystemWindowInsets(); | |
| } | |
| } else { | |
| // We were called from within a direct call to fitSystemWindows. | |
| if (fitSystemWindowsInt(insets.getSystemWindowInsets())) { | |
| return insets.consumeSystemWindowInsets(); | |
| } | |
| } | |
| return insets; | |
| } | |
| /** | |
| * Set an {@link OnApplyWindowInsetsListener} to take over the policy for applying | |
| * window insets to this view. The listener's | |
| * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} | |
| * method will be called instead of the view's | |
| * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. | |
| * | |
| * @param listener Listener to set | |
| * | |
| * @see #onApplyWindowInsets(WindowInsets) | |
| */ | |
| public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) { | |
| getListenerInfo().mOnApplyWindowInsetsListener = listener; | |
| } | |
| /** | |
| * Request to apply the given window insets to this view or another view in its subtree. | |
| * | |
| * <p>This method should be called by clients wishing to apply insets corresponding to areas | |
| * obscured by window decorations or overlays. This can include the status and navigation bars, | |
| * action bars, input methods and more. New inset categories may be added in the future. | |
| * The method returns the insets provided minus any that were applied by this view or its | |
| * children.</p> | |
| * | |
| * <p>Clients wishing to provide custom behavior should override the | |
| * {@link #onApplyWindowInsets(WindowInsets)} method or alternatively provide a | |
| * {@link OnApplyWindowInsetsListener} via the | |
| * {@link #setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) setOnApplyWindowInsetsListener} | |
| * method.</p> | |
| * | |
| * <p>This method replaces the older {@link #fitSystemWindows(Rect) fitSystemWindows} method. | |
| * </p> | |
| * | |
| * @param insets Insets to apply | |
| * @return The provided insets minus the insets that were consumed | |
| */ | |
| public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { | |
| try { | |
| mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; | |
| if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { | |
| return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); | |
| } else { | |
| return onApplyWindowInsets(insets); | |
| } | |
| } finally { | |
| mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; | |
| } | |
| } | |
| /** | |
| * Provide original WindowInsets that are dispatched to the view hierarchy. The insets are | |
| * only available if the view is attached. | |
| * | |
| * @return WindowInsets from the top of the view hierarchy or null if View is detached | |
| */ | |
| public WindowInsets getRootWindowInsets() { | |
| if (mAttachInfo != null) { | |
| return mAttachInfo.mViewRootImpl.getWindowInsets(false /* forceConstruct */); | |
| } | |
| return null; | |
| } | |
| /** | |
| * @hide Compute the insets that should be consumed by this view and the ones | |
| * that should propagate to those under it. | |
| */ | |
| protected boolean computeFitSystemWindows(Rect inoutInsets, Rect outLocalInsets) { | |
| if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 | |
| || mAttachInfo == null | |
| || ((mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0 | |
| && !mAttachInfo.mOverscanRequested)) { | |
| outLocalInsets.set(inoutInsets); | |
| inoutInsets.set(0, 0, 0, 0); | |
| return true; | |
| } else { | |
| // The application wants to take care of fitting system window for | |
| // the content... however we still need to take care of any overscan here. | |
| final Rect overscan = mAttachInfo.mOverscanInsets; | |
| outLocalInsets.set(overscan); | |
| inoutInsets.left -= overscan.left; | |
| inoutInsets.top -= overscan.top; | |
| inoutInsets.right -= overscan.right; | |
| inoutInsets.bottom -= overscan.bottom; | |
| return false; | |
| } | |
| } | |
| /** | |
| * Compute insets that should be consumed by this view and the ones that should propagate | |
| * to those under it. | |
| * | |
| * @param in Insets currently being processed by this View, likely received as a parameter | |
| * to {@link #onApplyWindowInsets(WindowInsets)}. | |
| * @param outLocalInsets A Rect that will receive the insets that should be consumed | |
| * by this view | |
| * @return Insets that should be passed along to views under this one | |
| */ | |
| public WindowInsets computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets) { | |
| if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 | |
| || mAttachInfo == null | |
| || (mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0) { | |
| outLocalInsets.set(in.getSystemWindowInsets()); | |
| return in.consumeSystemWindowInsets(); | |
| } else { | |
| outLocalInsets.set(0, 0, 0, 0); | |
| return in; | |
| } | |
| } | |
| /** | |
| * Sets whether or not this view should account for system screen decorations | |
| * such as the status bar and inset its content; that is, controlling whether | |
| * the default implementation of {@link #fitSystemWindows(Rect)} will be | |
| * executed. See that method for more details. | |
| * | |
| * <p>Note that if you are providing your own implementation of | |
| * {@link #fitSystemWindows(Rect)}, then there is no need to set this | |
| * flag to true -- your implementation will be overriding the default | |
| * implementation that checks this flag. | |
| * | |
| * @param fitSystemWindows If true, then the default implementation of | |
| * {@link #fitSystemWindows(Rect)} will be executed. | |
| * | |
| * @attr ref android.R.styleable#View_fitsSystemWindows | |
| * @see #getFitsSystemWindows() | |
| * @see #fitSystemWindows(Rect) | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| public void setFitsSystemWindows(boolean fitSystemWindows) { | |
| setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); | |
| } | |
| /** | |
| * Check for state of {@link #setFitsSystemWindows(boolean)}. If this method | |
| * returns {@code true}, the default implementation of {@link #fitSystemWindows(Rect)} | |
| * will be executed. | |
| * | |
| * @return {@code true} if the default implementation of | |
| * {@link #fitSystemWindows(Rect)} will be executed. | |
| * | |
| * @attr ref android.R.styleable#View_fitsSystemWindows | |
| * @see #setFitsSystemWindows(boolean) | |
| * @see #fitSystemWindows(Rect) | |
| * @see #setSystemUiVisibility(int) | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean getFitsSystemWindows() { | |
| return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; | |
| } | |
| /** @hide */ | |
| public boolean fitsSystemWindows() { | |
| return getFitsSystemWindows(); | |
| } | |
| /** | |
| * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. | |
| * @deprecated Use {@link #requestApplyInsets()} for newer platform versions. | |
| */ | |
| public void requestFitSystemWindows() { | |
| if (mParent != null) { | |
| mParent.requestFitSystemWindows(); | |
| } | |
| } | |
| /** | |
| * Ask that a new dispatch of {@link #onApplyWindowInsets(WindowInsets)} be performed. | |
| */ | |
| public void requestApplyInsets() { | |
| requestFitSystemWindows(); | |
| } | |
| /** | |
| * For use by PhoneWindow to make its own system window fitting optional. | |
| * @hide | |
| */ | |
| public void makeOptionalFitsSystemWindows() { | |
| setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); | |
| } | |
| /** | |
| * Returns the outsets, which areas of the device that aren't a surface, but we would like to | |
| * treat them as such. | |
| * @hide | |
| */ | |
| public void getOutsets(Rect outOutsetRect) { | |
| if (mAttachInfo != null) { | |
| outOutsetRect.set(mAttachInfo.mOutsets); | |
| } else { | |
| outOutsetRect.setEmpty(); | |
| } | |
| } | |
| /** | |
| * Returns the visibility status for this view. | |
| * | |
| * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. | |
| * @attr ref android.R.styleable#View_visibility | |
| */ | |
| @ViewDebug.ExportedProperty(mapping = { | |
| @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), | |
| @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), | |
| @ViewDebug.IntToString(from = GONE, to = "GONE") | |
| }) | |
| @Visibility | |
| public int getVisibility() { | |
| return mViewFlags & VISIBILITY_MASK; | |
| } | |
| /** | |
| * Set the enabled state of this view. | |
| * | |
| * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. | |
| * @attr ref android.R.styleable#View_visibility | |
| */ | |
| @RemotableViewMethod | |
| public void setVisibility(@Visibility int visibility) { | |
| setFlags(visibility, VISIBILITY_MASK); | |
| } | |
| /** | |
| * Returns the enabled status for this view. The interpretation of the | |
| * enabled state varies by subclass. | |
| * | |
| * @return True if this view is enabled, false otherwise. | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isEnabled() { | |
| return (mViewFlags & ENABLED_MASK) == ENABLED; | |
| } | |
| /** | |
| * Set the enabled state of this view. The interpretation of the enabled | |
| * state varies by subclass. | |
| * | |
| * @param enabled True if this view is enabled, false otherwise. | |
| */ | |
| @RemotableViewMethod | |
| public void setEnabled(boolean enabled) { | |
| if (enabled == isEnabled()) return; | |
| setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); | |
| /* | |
| * The View most likely has to change its appearance, so refresh | |
| * the drawable state. | |
| */ | |
| refreshDrawableState(); | |
| // Invalidate too, since the default behavior for views is to be | |
| // be drawn at 50% alpha rather than to change the drawable. | |
| invalidate(true); | |
| if (!enabled) { | |
| cancelPendingInputEvents(); | |
| } | |
| } | |
| /** | |
| * Set whether this view can receive the focus. | |
| * | |
| * Setting this to false will also ensure that this view is not focusable | |
| * in touch mode. | |
| * | |
| * @param focusable If true, this view can receive the focus. | |
| * | |
| * @see #setFocusableInTouchMode(boolean) | |
| * @attr ref android.R.styleable#View_focusable | |
| */ | |
| public void setFocusable(boolean focusable) { | |
| if (!focusable) { | |
| setFlags(0, FOCUSABLE_IN_TOUCH_MODE); | |
| } | |
| setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); | |
| } | |
| /** | |
| * Set whether this view can receive focus while in touch mode. | |
| * | |
| * Setting this to true will also ensure that this view is focusable. | |
| * | |
| * @param focusableInTouchMode If true, this view can receive the focus while | |
| * in touch mode. | |
| * | |
| * @see #setFocusable(boolean) | |
| * @attr ref android.R.styleable#View_focusableInTouchMode | |
| */ | |
| public void setFocusableInTouchMode(boolean focusableInTouchMode) { | |
| // Focusable in touch mode should always be set before the focusable flag | |
| // otherwise, setting the focusable flag will trigger a focusableViewAvailable() | |
| // which, in touch mode, will not successfully request focus on this view | |
| // because the focusable in touch mode flag is not set | |
| setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); | |
| if (focusableInTouchMode) { | |
| setFlags(FOCUSABLE, FOCUSABLE_MASK); | |
| } | |
| } | |
| /** | |
| * Set whether this view should have sound effects enabled for events such as | |
| * clicking and touching. | |
| * | |
| * <p>You may wish to disable sound effects for a view if you already play sounds, | |
| * for instance, a dial key that plays dtmf tones. | |
| * | |
| * @param soundEffectsEnabled whether sound effects are enabled for this view. | |
| * @see #isSoundEffectsEnabled() | |
| * @see #playSoundEffect(int) | |
| * @attr ref android.R.styleable#View_soundEffectsEnabled | |
| */ | |
| public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { | |
| setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); | |
| } | |
| /** | |
| * @return whether this view should have sound effects enabled for events such as | |
| * clicking and touching. | |
| * | |
| * @see #setSoundEffectsEnabled(boolean) | |
| * @see #playSoundEffect(int) | |
| * @attr ref android.R.styleable#View_soundEffectsEnabled | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isSoundEffectsEnabled() { | |
| return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); | |
| } | |
| /** | |
| * Set whether this view should have haptic feedback for events such as | |
| * long presses. | |
| * | |
| * <p>You may wish to disable haptic feedback if your view already controls | |
| * its own haptic feedback. | |
| * | |
| * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. | |
| * @see #isHapticFeedbackEnabled() | |
| * @see #performHapticFeedback(int) | |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled | |
| */ | |
| public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { | |
| setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); | |
| } | |
| /** | |
| * @return whether this view should have haptic feedback enabled for events | |
| * long presses. | |
| * | |
| * @see #setHapticFeedbackEnabled(boolean) | |
| * @see #performHapticFeedback(int) | |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isHapticFeedbackEnabled() { | |
| return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); | |
| } | |
| /** | |
| * Returns the layout direction for this view. | |
| * | |
| * @return One of {@link #LAYOUT_DIRECTION_LTR}, | |
| * {@link #LAYOUT_DIRECTION_RTL}, | |
| * {@link #LAYOUT_DIRECTION_INHERIT} or | |
| * {@link #LAYOUT_DIRECTION_LOCALE}. | |
| * | |
| * @attr ref android.R.styleable#View_layoutDirection | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout", mapping = { | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") | |
| }) | |
| @LayoutDir | |
| public int getRawLayoutDirection() { | |
| return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; | |
| } | |
| /** | |
| * Set the layout direction for this view. This will propagate a reset of layout direction | |
| * resolution to the view's children and resolve layout direction for this view. | |
| * | |
| * @param layoutDirection the layout direction to set. Should be one of: | |
| * | |
| * {@link #LAYOUT_DIRECTION_LTR}, | |
| * {@link #LAYOUT_DIRECTION_RTL}, | |
| * {@link #LAYOUT_DIRECTION_INHERIT}, | |
| * {@link #LAYOUT_DIRECTION_LOCALE}. | |
| * | |
| * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution | |
| * proceeds up the parent chain of the view to get the value. If there is no parent, then it | |
| * will return the default {@link #LAYOUT_DIRECTION_LTR}. | |
| * | |
| * @attr ref android.R.styleable#View_layoutDirection | |
| */ | |
| @RemotableViewMethod | |
| public void setLayoutDirection(@LayoutDir int layoutDirection) { | |
| if (getRawLayoutDirection() != layoutDirection) { | |
| // Reset the current layout direction and the resolved one | |
| mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; | |
| resetRtlProperties(); | |
| // Set the new layout direction (filtered) | |
| mPrivateFlags2 |= | |
| ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); | |
| // We need to resolve all RTL properties as they all depend on layout direction | |
| resolveRtlPropertiesIfNeeded(); | |
| requestLayout(); | |
| invalidate(true); | |
| } | |
| } | |
| /** | |
| * Returns the resolved layout direction for this view. | |
| * | |
| * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns | |
| * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. | |
| * | |
| * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version | |
| * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. | |
| * | |
| * @attr ref android.R.styleable#View_layoutDirection | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout", mapping = { | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), | |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") | |
| }) | |
| @ResolvedLayoutDir | |
| public int getLayoutDirection() { | |
| final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; | |
| if (targetSdkVersion < JELLY_BEAN_MR1) { | |
| mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; | |
| return LAYOUT_DIRECTION_RESOLVED_DEFAULT; | |
| } | |
| return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == | |
| PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; | |
| } | |
| /** | |
| * Indicates whether or not this view's layout is right-to-left. This is resolved from | |
| * layout attribute and/or the inherited value from the parent | |
| * | |
| * @return true if the layout is right-to-left. | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| public boolean isLayoutRtl() { | |
| return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); | |
| } | |
| /** | |
| * Indicates whether the view is currently tracking transient state that the | |
| * app should not need to concern itself with saving and restoring, but that | |
| * the framework should take special note to preserve when possible. | |
| * | |
| * <p>A view with transient state cannot be trivially rebound from an external | |
| * data source, such as an adapter binding item views in a list. This may be | |
| * because the view is performing an animation, tracking user selection | |
| * of content, or similar.</p> | |
| * | |
| * @return true if the view has transient state | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| public boolean hasTransientState() { | |
| return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; | |
| } | |
| /** | |
| * Set whether this view is currently tracking transient state that the | |
| * framework should attempt to preserve when possible. This flag is reference counted, | |
| * so every call to setHasTransientState(true) should be paired with a later call | |
| * to setHasTransientState(false). | |
| * | |
| * <p>A view with transient state cannot be trivially rebound from an external | |
| * data source, such as an adapter binding item views in a list. This may be | |
| * because the view is performing an animation, tracking user selection | |
| * of content, or similar.</p> | |
| * | |
| * @param hasTransientState true if this view has transient state | |
| */ | |
| public void setHasTransientState(boolean hasTransientState) { | |
| mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : | |
| mTransientStateCount - 1; | |
| if (mTransientStateCount < 0) { | |
| mTransientStateCount = 0; | |
| Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + | |
| "unmatched pair of setHasTransientState calls"); | |
| } else if ((hasTransientState && mTransientStateCount == 1) || | |
| (!hasTransientState && mTransientStateCount == 0)) { | |
| // update flag if we've just incremented up from 0 or decremented down to 0 | |
| mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | | |
| (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); | |
| if (mParent != null) { | |
| try { | |
| mParent.childHasTransientStateChanged(this, hasTransientState); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Returns true if this view is currently attached to a window. | |
| */ | |
| public boolean isAttachedToWindow() { | |
| return mAttachInfo != null; | |
| } | |
| /** | |
| * Returns true if this view has been through at least one layout since it | |
| * was last attached to or detached from a window. | |
| */ | |
| public boolean isLaidOut() { | |
| return (mPrivateFlags3 & PFLAG3_IS_LAID_OUT) == PFLAG3_IS_LAID_OUT; | |
| } | |
| /** | |
| * If this view doesn't do any drawing on its own, set this flag to | |
| * allow further optimizations. By default, this flag is not set on | |
| * View, but could be set on some View subclasses such as ViewGroup. | |
| * | |
| * Typically, if you override {@link #onDraw(android.graphics.Canvas)} | |
| * you should clear this flag. | |
| * | |
| * @param willNotDraw whether or not this View draw on its own | |
| */ | |
| public void setWillNotDraw(boolean willNotDraw) { | |
| setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); | |
| } | |
| /** | |
| * Returns whether or not this View draws on its own. | |
| * | |
| * @return true if this view has nothing to draw, false otherwise | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean willNotDraw() { | |
| return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; | |
| } | |
| /** | |
| * When a View's drawing cache is enabled, drawing is redirected to an | |
| * offscreen bitmap. Some views, like an ImageView, must be able to | |
| * bypass this mechanism if they already draw a single bitmap, to avoid | |
| * unnecessary usage of the memory. | |
| * | |
| * @param willNotCacheDrawing true if this view does not cache its | |
| * drawing, false otherwise | |
| */ | |
| public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { | |
| setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); | |
| } | |
| /** | |
| * Returns whether or not this View can cache its drawing or not. | |
| * | |
| * @return true if this view does not cache its drawing, false otherwise | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean willNotCacheDrawing() { | |
| return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; | |
| } | |
| /** | |
| * Indicates whether this view reacts to click events or not. | |
| * | |
| * @return true if the view is clickable, false otherwise | |
| * | |
| * @see #setClickable(boolean) | |
| * @attr ref android.R.styleable#View_clickable | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isClickable() { | |
| return (mViewFlags & CLICKABLE) == CLICKABLE; | |
| } | |
| /** | |
| * Enables or disables click events for this view. When a view | |
| * is clickable it will change its state to "pressed" on every click. | |
| * Subclasses should set the view clickable to visually react to | |
| * user's clicks. | |
| * | |
| * @param clickable true to make the view clickable, false otherwise | |
| * | |
| * @see #isClickable() | |
| * @attr ref android.R.styleable#View_clickable | |
| */ | |
| public void setClickable(boolean clickable) { | |
| setFlags(clickable ? CLICKABLE : 0, CLICKABLE); | |
| } | |
| /** | |
| * Indicates whether this view reacts to long click events or not. | |
| * | |
| * @return true if the view is long clickable, false otherwise | |
| * | |
| * @see #setLongClickable(boolean) | |
| * @attr ref android.R.styleable#View_longClickable | |
| */ | |
| public boolean isLongClickable() { | |
| return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; | |
| } | |
| /** | |
| * Enables or disables long click events for this view. When a view is long | |
| * clickable it reacts to the user holding down the button for a longer | |
| * duration than a tap. This event can either launch the listener or a | |
| * context menu. | |
| * | |
| * @param longClickable true to make the view long clickable, false otherwise | |
| * @see #isLongClickable() | |
| * @attr ref android.R.styleable#View_longClickable | |
| */ | |
| public void setLongClickable(boolean longClickable) { | |
| setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); | |
| } | |
| /** | |
| * Indicates whether this view reacts to context clicks or not. | |
| * | |
| * @return true if the view is context clickable, false otherwise | |
| * @see #setContextClickable(boolean) | |
| * @attr ref android.R.styleable#View_contextClickable | |
| */ | |
| public boolean isContextClickable() { | |
| return (mViewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; | |
| } | |
| /** | |
| * Enables or disables context clicking for this view. This event can launch the listener. | |
| * | |
| * @param contextClickable true to make the view react to a context click, false otherwise | |
| * @see #isContextClickable() | |
| * @attr ref android.R.styleable#View_contextClickable | |
| */ | |
| public void setContextClickable(boolean contextClickable) { | |
| setFlags(contextClickable ? CONTEXT_CLICKABLE : 0, CONTEXT_CLICKABLE); | |
| } | |
| /** | |
| * Sets the pressed state for this view and provides a touch coordinate for | |
| * animation hinting. | |
| * | |
| * @param pressed Pass true to set the View's internal state to "pressed", | |
| * or false to reverts the View's internal state from a | |
| * previously set "pressed" state. | |
| * @param x The x coordinate of the touch that caused the press | |
| * @param y The y coordinate of the touch that caused the press | |
| */ | |
| private void setPressed(boolean pressed, float x, float y) { | |
| if (pressed) { | |
| drawableHotspotChanged(x, y); | |
| } | |
| setPressed(pressed); | |
| } | |
| /** | |
| * Sets the pressed state for this view. | |
| * | |
| * @see #isClickable() | |
| * @see #setClickable(boolean) | |
| * | |
| * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts | |
| * the View's internal state from a previously set "pressed" state. | |
| */ | |
| public void setPressed(boolean pressed) { | |
| final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); | |
| if (pressed) { | |
| mPrivateFlags |= PFLAG_PRESSED; | |
| } else { | |
| mPrivateFlags &= ~PFLAG_PRESSED; | |
| } | |
| if (needsRefresh) { | |
| refreshDrawableState(); | |
| } | |
| dispatchSetPressed(pressed); | |
| } | |
| /** | |
| * Dispatch setPressed to all of this View's children. | |
| * | |
| * @see #setPressed(boolean) | |
| * | |
| * @param pressed The new pressed state | |
| */ | |
| protected void dispatchSetPressed(boolean pressed) { | |
| } | |
| /** | |
| * Indicates whether the view is currently in pressed state. Unless | |
| * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter | |
| * the pressed state. | |
| * | |
| * @see #setPressed(boolean) | |
| * @see #isClickable() | |
| * @see #setClickable(boolean) | |
| * | |
| * @return true if the view is currently pressed, false otherwise | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isPressed() { | |
| return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; | |
| } | |
| /** | |
| * @hide | |
| * Indicates whether this view will participate in data collection through | |
| * {@link ViewStructure}. If true, it will not provide any data | |
| * for itself or its children. If false, the normal data collection will be allowed. | |
| * | |
| * @return Returns false if assist data collection is not blocked, else true. | |
| * | |
| * @see #setAssistBlocked(boolean) | |
| * @attr ref android.R.styleable#View_assistBlocked | |
| */ | |
| public boolean isAssistBlocked() { | |
| return (mPrivateFlags3 & PFLAG3_ASSIST_BLOCKED) != 0; | |
| } | |
| /** | |
| * @hide | |
| * Controls whether assist data collection from this view and its children is enabled | |
| * (that is, whether {@link #onProvideStructure} and | |
| * {@link #onProvideVirtualStructure} will be called). The default value is false, | |
| * allowing normal assist collection. Setting this to false will disable assist collection. | |
| * | |
| * @param enabled Set to true to <em>disable</em> assist data collection, or false | |
| * (the default) to allow it. | |
| * | |
| * @see #isAssistBlocked() | |
| * @see #onProvideStructure | |
| * @see #onProvideVirtualStructure | |
| * @attr ref android.R.styleable#View_assistBlocked | |
| */ | |
| public void setAssistBlocked(boolean enabled) { | |
| if (enabled) { | |
| mPrivateFlags3 |= PFLAG3_ASSIST_BLOCKED; | |
| } else { | |
| mPrivateFlags3 &= ~PFLAG3_ASSIST_BLOCKED; | |
| } | |
| } | |
| /** | |
| * Indicates whether this view will save its state (that is, | |
| * whether its {@link #onSaveInstanceState} method will be called). | |
| * | |
| * @return Returns true if the view state saving is enabled, else false. | |
| * | |
| * @see #setSaveEnabled(boolean) | |
| * @attr ref android.R.styleable#View_saveEnabled | |
| */ | |
| public boolean isSaveEnabled() { | |
| return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; | |
| } | |
| /** | |
| * Controls whether the saving of this view's state is | |
| * enabled (that is, whether its {@link #onSaveInstanceState} method | |
| * will be called). Note that even if freezing is enabled, the | |
| * view still must have an id assigned to it (via {@link #setId(int)}) | |
| * for its state to be saved. This flag can only disable the | |
| * saving of this view; any child views may still have their state saved. | |
| * | |
| * @param enabled Set to false to <em>disable</em> state saving, or true | |
| * (the default) to allow it. | |
| * | |
| * @see #isSaveEnabled() | |
| * @see #setId(int) | |
| * @see #onSaveInstanceState() | |
| * @attr ref android.R.styleable#View_saveEnabled | |
| */ | |
| public void setSaveEnabled(boolean enabled) { | |
| setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); | |
| } | |
| /** | |
| * Gets whether the framework should discard touches when the view's | |
| * window is obscured by another visible window. | |
| * Refer to the {@link View} security documentation for more details. | |
| * | |
| * @return True if touch filtering is enabled. | |
| * | |
| * @see #setFilterTouchesWhenObscured(boolean) | |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean getFilterTouchesWhenObscured() { | |
| return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; | |
| } | |
| /** | |
| * Sets whether the framework should discard touches when the view's | |
| * window is obscured by another visible window. | |
| * Refer to the {@link View} security documentation for more details. | |
| * | |
| * @param enabled True if touch filtering should be enabled. | |
| * | |
| * @see #getFilterTouchesWhenObscured | |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured | |
| */ | |
| public void setFilterTouchesWhenObscured(boolean enabled) { | |
| setFlags(enabled ? FILTER_TOUCHES_WHEN_OBSCURED : 0, | |
| FILTER_TOUCHES_WHEN_OBSCURED); | |
| } | |
| /** | |
| * Indicates whether the entire hierarchy under this view will save its | |
| * state when a state saving traversal occurs from its parent. The default | |
| * is true; if false, these views will not be saved unless | |
| * {@link #saveHierarchyState(SparseArray)} is called directly on this view. | |
| * | |
| * @return Returns true if the view state saving from parent is enabled, else false. | |
| * | |
| * @see #setSaveFromParentEnabled(boolean) | |
| */ | |
| public boolean isSaveFromParentEnabled() { | |
| return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; | |
| } | |
| /** | |
| * Controls whether the entire hierarchy under this view will save its | |
| * state when a state saving traversal occurs from its parent. The default | |
| * is true; if false, these views will not be saved unless | |
| * {@link #saveHierarchyState(SparseArray)} is called directly on this view. | |
| * | |
| * @param enabled Set to false to <em>disable</em> state saving, or true | |
| * (the default) to allow it. | |
| * | |
| * @see #isSaveFromParentEnabled() | |
| * @see #setId(int) | |
| * @see #onSaveInstanceState() | |
| */ | |
| public void setSaveFromParentEnabled(boolean enabled) { | |
| setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); | |
| } | |
| /** | |
| * Returns whether this View is able to take focus. | |
| * | |
| * @return True if this view can take focus, or false otherwise. | |
| * @attr ref android.R.styleable#View_focusable | |
| */ | |
| @ViewDebug.ExportedProperty(category = "focus") | |
| public final boolean isFocusable() { | |
| return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); | |
| } | |
| /** | |
| * When a view is focusable, it may not want to take focus when in touch mode. | |
| * For example, a button would like focus when the user is navigating via a D-pad | |
| * so that the user can click on it, but once the user starts touching the screen, | |
| * the button shouldn't take focus | |
| * @return Whether the view is focusable in touch mode. | |
| * @attr ref android.R.styleable#View_focusableInTouchMode | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public final boolean isFocusableInTouchMode() { | |
| return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); | |
| } | |
| /** | |
| * Find the nearest view in the specified direction that can take focus. | |
| * This does not actually give focus to that view. | |
| * | |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT | |
| * | |
| * @return The nearest focusable in the specified direction, or null if none | |
| * can be found. | |
| */ | |
| public View focusSearch(@FocusRealDirection int direction) { | |
| if (mParent != null) { | |
| return mParent.focusSearch(this, direction); | |
| } else { | |
| return null; | |
| } | |
| } | |
| /** | |
| * This method is the last chance for the focused view and its ancestors to | |
| * respond to an arrow key. This is called when the focused view did not | |
| * consume the key internally, nor could the view system find a new view in | |
| * the requested direction to give focus to. | |
| * | |
| * @param focused The currently focused view. | |
| * @param direction The direction focus wants to move. One of FOCUS_UP, | |
| * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. | |
| * @return True if the this view consumed this unhandled move. | |
| */ | |
| public boolean dispatchUnhandledMove(View focused, @FocusRealDirection int direction) { | |
| return false; | |
| } | |
| /** | |
| * If a user manually specified the next view id for a particular direction, | |
| * use the root to look up the view. | |
| * @param root The root view of the hierarchy containing this view. | |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, | |
| * or FOCUS_BACKWARD. | |
| * @return The user specified next view, or null if there is none. | |
| */ | |
| View findUserSetNextFocus(View root, @FocusDirection int direction) { | |
| switch (direction) { | |
| case FOCUS_LEFT: | |
| if (mNextFocusLeftId == View.NO_ID) return null; | |
| return findViewInsideOutShouldExist(root, mNextFocusLeftId); | |
| case FOCUS_RIGHT: | |
| if (mNextFocusRightId == View.NO_ID) return null; | |
| return findViewInsideOutShouldExist(root, mNextFocusRightId); | |
| case FOCUS_UP: | |
| if (mNextFocusUpId == View.NO_ID) return null; | |
| return findViewInsideOutShouldExist(root, mNextFocusUpId); | |
| case FOCUS_DOWN: | |
| if (mNextFocusDownId == View.NO_ID) return null; | |
| return findViewInsideOutShouldExist(root, mNextFocusDownId); | |
| case FOCUS_FORWARD: | |
| if (mNextFocusForwardId == View.NO_ID) return null; | |
| return findViewInsideOutShouldExist(root, mNextFocusForwardId); | |
| case FOCUS_BACKWARD: { | |
| if (mID == View.NO_ID) return null; | |
| final int id = mID; | |
| return root.findViewByPredicateInsideOut(this, new Predicate<View>() { | |
| @Override | |
| public boolean apply(View t) { | |
| return t.mNextFocusForwardId == id; | |
| } | |
| }); | |
| } | |
| } | |
| return null; | |
| } | |
| private View findViewInsideOutShouldExist(View root, int id) { | |
| if (mMatchIdPredicate == null) { | |
| mMatchIdPredicate = new MatchIdPredicate(); | |
| } | |
| mMatchIdPredicate.mId = id; | |
| View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); | |
| if (result == null) { | |
| Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); | |
| } | |
| return result; | |
| } | |
| /** | |
| * Find and return all focusable views that are descendants of this view, | |
| * possibly including this view if it is focusable itself. | |
| * | |
| * @param direction The direction of the focus | |
| * @return A list of focusable views | |
| */ | |
| public ArrayList<View> getFocusables(@FocusDirection int direction) { | |
| ArrayList<View> result = new ArrayList<View>(24); | |
| addFocusables(result, direction); | |
| return result; | |
| } | |
| /** | |
| * Add any focusable views that are descendants of this view (possibly | |
| * including this view if it is focusable itself) to views. If we are in touch mode, | |
| * only add views that are also focusable in touch mode. | |
| * | |
| * @param views Focusable views found so far | |
| * @param direction The direction of the focus | |
| */ | |
| public void addFocusables(ArrayList<View> views, @FocusDirection int direction) { | |
| addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); | |
| } | |
| /** | |
| * Adds any focusable views that are descendants of this view (possibly | |
| * including this view if it is focusable itself) to views. This method | |
| * adds all focusable views regardless if we are in touch mode or | |
| * only views focusable in touch mode if we are in touch mode or | |
| * only views that can take accessibility focus if accessibility is enabled | |
| * depending on the focusable mode parameter. | |
| * | |
| * @param views Focusable views found so far or null if all we are interested is | |
| * the number of focusables. | |
| * @param direction The direction of the focus. | |
| * @param focusableMode The type of focusables to be added. | |
| * | |
| * @see #FOCUSABLES_ALL | |
| * @see #FOCUSABLES_TOUCH_MODE | |
| */ | |
| public void addFocusables(ArrayList<View> views, @FocusDirection int direction, | |
| @FocusableMode int focusableMode) { | |
| if (views == null) { | |
| return; | |
| } | |
| if (!isFocusable()) { | |
| return; | |
| } | |
| if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE | |
| && isInTouchMode() && !isFocusableInTouchMode()) { | |
| return; | |
| } | |
| views.add(this); | |
| } | |
| /** | |
| * Finds the Views that contain given text. The containment is case insensitive. | |
| * The search is performed by either the text that the View renders or the content | |
| * description that describes the view for accessibility purposes and the view does | |
| * not render or both. Clients can specify how the search is to be performed via | |
| * passing the {@link #FIND_VIEWS_WITH_TEXT} and | |
| * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. | |
| * | |
| * @param outViews The output list of matching Views. | |
| * @param searched The text to match against. | |
| * | |
| * @see #FIND_VIEWS_WITH_TEXT | |
| * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION | |
| * @see #setContentDescription(CharSequence) | |
| */ | |
| public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, | |
| @FindViewFlags int flags) { | |
| if (getAccessibilityNodeProvider() != null) { | |
| if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { | |
| outViews.add(this); | |
| } | |
| } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 | |
| && (searched != null && searched.length() > 0) | |
| && (mContentDescription != null && mContentDescription.length() > 0)) { | |
| String searchedLowerCase = searched.toString().toLowerCase(); | |
| String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); | |
| if (contentDescriptionLowerCase.contains(searchedLowerCase)) { | |
| outViews.add(this); | |
| } | |
| } | |
| } | |
| /** | |
| * Find and return all touchable views that are descendants of this view, | |
| * possibly including this view if it is touchable itself. | |
| * | |
| * @return A list of touchable views | |
| */ | |
| public ArrayList<View> getTouchables() { | |
| ArrayList<View> result = new ArrayList<View>(); | |
| addTouchables(result); | |
| return result; | |
| } | |
| /** | |
| * Add any touchable views that are descendants of this view (possibly | |
| * including this view if it is touchable itself) to views. | |
| * | |
| * @param views Touchable views found so far | |
| */ | |
| public void addTouchables(ArrayList<View> views) { | |
| final int viewFlags = mViewFlags; | |
| if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE | |
| || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) | |
| && (viewFlags & ENABLED_MASK) == ENABLED) { | |
| views.add(this); | |
| } | |
| } | |
| /** | |
| * Returns whether this View is accessibility focused. | |
| * | |
| * @return True if this View is accessibility focused. | |
| */ | |
| public boolean isAccessibilityFocused() { | |
| return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; | |
| } | |
| /** | |
| * Call this to try to give accessibility focus to this view. | |
| * | |
| * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} | |
| * returns false or the view is no visible or the view already has accessibility | |
| * focus. | |
| * | |
| * See also {@link #focusSearch(int)}, which is what you call to say that you | |
| * have focus, and you want your parent to look for the next one. | |
| * | |
| * @return Whether this view actually took accessibility focus. | |
| * | |
| * @hide | |
| */ | |
| public boolean requestAccessibilityFocus() { | |
| AccessibilityManager manager = AccessibilityManager.getInstance(mContext); | |
| if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { | |
| return false; | |
| } | |
| if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { | |
| return false; | |
| } | |
| if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { | |
| mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; | |
| ViewRootImpl viewRootImpl = getViewRootImpl(); | |
| if (viewRootImpl != null) { | |
| viewRootImpl.setAccessibilityFocus(this, null); | |
| } | |
| invalidate(); | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Call this to try to clear accessibility focus of this view. | |
| * | |
| * See also {@link #focusSearch(int)}, which is what you call to say that you | |
| * have focus, and you want your parent to look for the next one. | |
| * | |
| * @hide | |
| */ | |
| public void clearAccessibilityFocus() { | |
| clearAccessibilityFocusNoCallbacks(); | |
| // Clear the global reference of accessibility focus if this | |
| // view or any of its descendants had accessibility focus. | |
| ViewRootImpl viewRootImpl = getViewRootImpl(); | |
| if (viewRootImpl != null) { | |
| View focusHost = viewRootImpl.getAccessibilityFocusedHost(); | |
| if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { | |
| viewRootImpl.setAccessibilityFocus(null, null); | |
| } | |
| } | |
| } | |
| private void sendAccessibilityHoverEvent(int eventType) { | |
| // Since we are not delivering to a client accessibility events from not | |
| // important views (unless the clinet request that) we need to fire the | |
| // event from the deepest view exposed to the client. As a consequence if | |
| // the user crosses a not exposed view the client will see enter and exit | |
| // of the exposed predecessor followed by and enter and exit of that same | |
| // predecessor when entering and exiting the not exposed descendant. This | |
| // is fine since the client has a clear idea which view is hovered at the | |
| // price of a couple more events being sent. This is a simple and | |
| // working solution. | |
| View source = this; | |
| while (true) { | |
| if (source.includeForAccessibility()) { | |
| source.sendAccessibilityEvent(eventType); | |
| return; | |
| } | |
| ViewParent parent = source.getParent(); | |
| if (parent instanceof View) { | |
| source = (View) parent; | |
| } else { | |
| return; | |
| } | |
| } | |
| } | |
| /** | |
| * Clears accessibility focus without calling any callback methods | |
| * normally invoked in {@link #clearAccessibilityFocus()}. This method | |
| * is used for clearing accessibility focus when giving this focus to | |
| * another view. | |
| */ | |
| void clearAccessibilityFocusNoCallbacks() { | |
| if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { | |
| mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; | |
| invalidate(); | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); | |
| } | |
| } | |
| /** | |
| * Call this to try to give focus to a specific view or to one of its | |
| * descendants. | |
| * | |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns | |
| * false), or if it is focusable and it is not focusable in touch mode | |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. | |
| * | |
| * See also {@link #focusSearch(int)}, which is what you call to say that you | |
| * have focus, and you want your parent to look for the next one. | |
| * | |
| * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments | |
| * {@link #FOCUS_DOWN} and <code>null</code>. | |
| * | |
| * @return Whether this view or one of its descendants actually took focus. | |
| */ | |
| public final boolean requestFocus() { | |
| return requestFocus(View.FOCUS_DOWN); | |
| } | |
| /** | |
| * Call this to try to give focus to a specific view or to one of its | |
| * descendants and give it a hint about what direction focus is heading. | |
| * | |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns | |
| * false), or if it is focusable and it is not focusable in touch mode | |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. | |
| * | |
| * See also {@link #focusSearch(int)}, which is what you call to say that you | |
| * have focus, and you want your parent to look for the next one. | |
| * | |
| * This is equivalent to calling {@link #requestFocus(int, Rect)} with | |
| * <code>null</code> set for the previously focused rectangle. | |
| * | |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT | |
| * @return Whether this view or one of its descendants actually took focus. | |
| */ | |
| public final boolean requestFocus(int direction) { | |
| return requestFocus(direction, null); | |
| } | |
| /** | |
| * Call this to try to give focus to a specific view or to one of its descendants | |
| * and give it hints about the direction and a specific rectangle that the focus | |
| * is coming from. The rectangle can help give larger views a finer grained hint | |
| * about where focus is coming from, and therefore, where to show selection, or | |
| * forward focus change internally. | |
| * | |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns | |
| * false), or if it is focusable and it is not focusable in touch mode | |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. | |
| * | |
| * A View will not take focus if it is not visible. | |
| * | |
| * A View will not take focus if one of its parents has | |
| * {@link android.view.ViewGroup#getDescendantFocusability()} equal to | |
| * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. | |
| * | |
| * See also {@link #focusSearch(int)}, which is what you call to say that you | |
| * have focus, and you want your parent to look for the next one. | |
| * | |
| * You may wish to override this method if your custom {@link View} has an internal | |
| * {@link View} that it wishes to forward the request to. | |
| * | |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT | |
| * @param previouslyFocusedRect The rectangle (in this View's coordinate system) | |
| * to give a finer grained hint about where focus is coming from. May be null | |
| * if there is no hint. | |
| * @return Whether this view or one of its descendants actually took focus. | |
| */ | |
| public boolean requestFocus(int direction, Rect previouslyFocusedRect) { | |
| return requestFocusNoSearch(direction, previouslyFocusedRect); | |
| } | |
| private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { | |
| // need to be focusable | |
| if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || | |
| (mViewFlags & VISIBILITY_MASK) != VISIBLE) { | |
| return false; | |
| } | |
| // need to be focusable in touch mode if in touch mode | |
| if (isInTouchMode() && | |
| (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { | |
| return false; | |
| } | |
| // need to not have any parents blocking us | |
| if (hasAncestorThatBlocksDescendantFocus()) { | |
| return false; | |
| } | |
| handleFocusGainInternal(direction, previouslyFocusedRect); | |
| return true; | |
| } | |
| /** | |
| * Call this to try to give focus to a specific view or to one of its descendants. This is a | |
| * special variant of {@link #requestFocus() } that will allow views that are not focusable in | |
| * touch mode to request focus when they are touched. | |
| * | |
| * @return Whether this view or one of its descendants actually took focus. | |
| * | |
| * @see #isInTouchMode() | |
| * | |
| */ | |
| public final boolean requestFocusFromTouch() { | |
| // Leave touch mode if we need to | |
| if (isInTouchMode()) { | |
| ViewRootImpl viewRoot = getViewRootImpl(); | |
| if (viewRoot != null) { | |
| viewRoot.ensureTouchMode(false); | |
| } | |
| } | |
| return requestFocus(View.FOCUS_DOWN); | |
| } | |
| /** | |
| * @return Whether any ancestor of this view blocks descendant focus. | |
| */ | |
| private boolean hasAncestorThatBlocksDescendantFocus() { | |
| final boolean focusableInTouchMode = isFocusableInTouchMode(); | |
| ViewParent ancestor = mParent; | |
| while (ancestor instanceof ViewGroup) { | |
| final ViewGroup vgAncestor = (ViewGroup) ancestor; | |
| if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS | |
| || (!focusableInTouchMode && vgAncestor.shouldBlockFocusForTouchscreen())) { | |
| return true; | |
| } else { | |
| ancestor = vgAncestor.getParent(); | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Gets the mode for determining whether this View is important for accessibility | |
| * which is if it fires accessibility events and if it is reported to | |
| * accessibility services that query the screen. | |
| * | |
| * @return The mode for determining whether a View is important for accessibility. | |
| * | |
| * @attr ref android.R.styleable#View_importantForAccessibility | |
| * | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_YES | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_NO | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO | |
| */ | |
| @ViewDebug.ExportedProperty(category = "accessibility", mapping = { | |
| @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), | |
| @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), | |
| @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"), | |
| @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, | |
| to = "noHideDescendants") | |
| }) | |
| public int getImportantForAccessibility() { | |
| return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) | |
| >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; | |
| } | |
| /** | |
| * Sets the live region mode for this view. This indicates to accessibility | |
| * services whether they should automatically notify the user about changes | |
| * to the view's content description or text, or to the content descriptions | |
| * or text of the view's children (where applicable). | |
| * <p> | |
| * For example, in a login screen with a TextView that displays an "incorrect | |
| * password" notification, that view should be marked as a live region with | |
| * mode {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. | |
| * <p> | |
| * To disable change notifications for this view, use | |
| * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. This is the default live region | |
| * mode for most views. | |
| * <p> | |
| * To indicate that the user should be notified of changes, use | |
| * {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. | |
| * <p> | |
| * If the view's changes should interrupt ongoing speech and notify the user | |
| * immediately, use {@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE}. | |
| * | |
| * @param mode The live region mode for this view, one of: | |
| * <ul> | |
| * <li>{@link #ACCESSIBILITY_LIVE_REGION_NONE} | |
| * <li>{@link #ACCESSIBILITY_LIVE_REGION_POLITE} | |
| * <li>{@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE} | |
| * </ul> | |
| * @attr ref android.R.styleable#View_accessibilityLiveRegion | |
| */ | |
| public void setAccessibilityLiveRegion(int mode) { | |
| if (mode != getAccessibilityLiveRegion()) { | |
| mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; | |
| mPrivateFlags2 |= (mode << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT) | |
| & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } | |
| /** | |
| * Gets the live region mode for this View. | |
| * | |
| * @return The live region mode for the view. | |
| * | |
| * @attr ref android.R.styleable#View_accessibilityLiveRegion | |
| * | |
| * @see #setAccessibilityLiveRegion(int) | |
| */ | |
| public int getAccessibilityLiveRegion() { | |
| return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK) | |
| >> PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; | |
| } | |
| /** | |
| * Sets how to determine whether this view is important for accessibility | |
| * which is if it fires accessibility events and if it is reported to | |
| * accessibility services that query the screen. | |
| * | |
| * @param mode How to determine whether this view is important for accessibility. | |
| * | |
| * @attr ref android.R.styleable#View_importantForAccessibility | |
| * | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_YES | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_NO | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS | |
| * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO | |
| */ | |
| public void setImportantForAccessibility(int mode) { | |
| final int oldMode = getImportantForAccessibility(); | |
| if (mode != oldMode) { | |
| // If we're moving between AUTO and another state, we might not need | |
| // to send a subtree changed notification. We'll store the computed | |
| // importance, since we'll need to check it later to make sure. | |
| final boolean maySkipNotify = oldMode == IMPORTANT_FOR_ACCESSIBILITY_AUTO | |
| || mode == IMPORTANT_FOR_ACCESSIBILITY_AUTO; | |
| final boolean oldIncludeForAccessibility = maySkipNotify && includeForAccessibility(); | |
| mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; | |
| mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) | |
| & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; | |
| if (!maySkipNotify || oldIncludeForAccessibility != includeForAccessibility()) { | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } else { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } | |
| } | |
| /** | |
| * Computes whether this view should be exposed for accessibility. In | |
| * general, views that are interactive or provide information are exposed | |
| * while views that serve only as containers are hidden. | |
| * <p> | |
| * If an ancestor of this view has importance | |
| * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, this method | |
| * returns <code>false</code>. | |
| * <p> | |
| * Otherwise, the value is computed according to the view's | |
| * {@link #getImportantForAccessibility()} value: | |
| * <ol> | |
| * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_NO} or | |
| * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, return <code>false | |
| * </code> | |
| * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_YES}, return <code>true</code> | |
| * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_AUTO}, return <code>true</code> if | |
| * view satisfies any of the following: | |
| * <ul> | |
| * <li>Is actionable, e.g. {@link #isClickable()}, | |
| * {@link #isLongClickable()}, or {@link #isFocusable()} | |
| * <li>Has an {@link AccessibilityDelegate} | |
| * <li>Has an interaction listener, e.g. {@link OnTouchListener}, | |
| * {@link OnKeyListener}, etc. | |
| * <li>Is an accessibility live region, e.g. | |
| * {@link #getAccessibilityLiveRegion()} is not | |
| * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. | |
| * </ul> | |
| * </ol> | |
| * | |
| * @return Whether the view is exposed for accessibility. | |
| * @see #setImportantForAccessibility(int) | |
| * @see #getImportantForAccessibility() | |
| */ | |
| public boolean isImportantForAccessibility() { | |
| final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) | |
| >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; | |
| if (mode == IMPORTANT_FOR_ACCESSIBILITY_NO | |
| || mode == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { | |
| return false; | |
| } | |
| // Check parent mode to ensure we're not hidden. | |
| ViewParent parent = mParent; | |
| while (parent instanceof View) { | |
| if (((View) parent).getImportantForAccessibility() | |
| == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { | |
| return false; | |
| } | |
| parent = parent.getParent(); | |
| } | |
| return mode == IMPORTANT_FOR_ACCESSIBILITY_YES || isActionableForAccessibility() | |
| || hasListenersForAccessibility() || getAccessibilityNodeProvider() != null | |
| || getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE; | |
| } | |
| /** | |
| * Gets the parent for accessibility purposes. Note that the parent for | |
| * accessibility is not necessary the immediate parent. It is the first | |
| * predecessor that is important for accessibility. | |
| * | |
| * @return The parent for accessibility purposes. | |
| */ | |
| public ViewParent getParentForAccessibility() { | |
| if (mParent instanceof View) { | |
| View parentView = (View) mParent; | |
| if (parentView.includeForAccessibility()) { | |
| return mParent; | |
| } else { | |
| return mParent.getParentForAccessibility(); | |
| } | |
| } | |
| return null; | |
| } | |
| /** | |
| * Adds the children of this View relevant for accessibility to the given list | |
| * as output. Since some Views are not important for accessibility the added | |
| * child views are not necessarily direct children of this view, rather they are | |
| * the first level of descendants important for accessibility. | |
| * | |
| * @param outChildren The output list that will receive children for accessibility. | |
| */ | |
| public void addChildrenForAccessibility(ArrayList<View> outChildren) { | |
| } | |
| /** | |
| * Whether to regard this view for accessibility. A view is regarded for | |
| * accessibility if it is important for accessibility or the querying | |
| * accessibility service has explicitly requested that view not | |
| * important for accessibility are regarded. | |
| * | |
| * @return Whether to regard the view for accessibility. | |
| * | |
| * @hide | |
| */ | |
| public boolean includeForAccessibility() { | |
| if (mAttachInfo != null) { | |
| return (mAttachInfo.mAccessibilityFetchFlags | |
| & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0 | |
| || isImportantForAccessibility(); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Returns whether the View is considered actionable from | |
| * accessibility perspective. Such view are important for | |
| * accessibility. | |
| * | |
| * @return True if the view is actionable for accessibility. | |
| * | |
| * @hide | |
| */ | |
| public boolean isActionableForAccessibility() { | |
| return (isClickable() || isLongClickable() || isFocusable()); | |
| } | |
| /** | |
| * Returns whether the View has registered callbacks which makes it | |
| * important for accessibility. | |
| * | |
| * @return True if the view is actionable for accessibility. | |
| */ | |
| private boolean hasListenersForAccessibility() { | |
| ListenerInfo info = getListenerInfo(); | |
| return mTouchDelegate != null || info.mOnKeyListener != null | |
| || info.mOnTouchListener != null || info.mOnGenericMotionListener != null | |
| || info.mOnHoverListener != null || info.mOnDragListener != null; | |
| } | |
| /** | |
| * Notifies that the accessibility state of this view changed. The change | |
| * is local to this view and does not represent structural changes such | |
| * as children and parent. For example, the view became focusable. The | |
| * notification is at at most once every | |
| * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} | |
| * to avoid unnecessary load to the system. Also once a view has a pending | |
| * notification this method is a NOP until the notification has been sent. | |
| * | |
| * @hide | |
| */ | |
| public void notifyViewAccessibilityStateChangedIfNeeded(int changeType) { | |
| if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { | |
| return; | |
| } | |
| if (mSendViewStateChangedAccessibilityEvent == null) { | |
| mSendViewStateChangedAccessibilityEvent = | |
| new SendViewStateChangedAccessibilityEvent(); | |
| } | |
| mSendViewStateChangedAccessibilityEvent.runOrPost(changeType); | |
| } | |
| /** | |
| * Notifies that the accessibility state of this view changed. The change | |
| * is *not* local to this view and does represent structural changes such | |
| * as children and parent. For example, the view size changed. The | |
| * notification is at at most once every | |
| * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} | |
| * to avoid unnecessary load to the system. Also once a view has a pending | |
| * notification this method is a NOP until the notification has been sent. | |
| * | |
| * @hide | |
| */ | |
| public void notifySubtreeAccessibilityStateChangedIfNeeded() { | |
| if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { | |
| return; | |
| } | |
| if ((mPrivateFlags2 & PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED) == 0) { | |
| mPrivateFlags2 |= PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; | |
| if (mParent != null) { | |
| try { | |
| mParent.notifySubtreeAccessibilityStateChanged( | |
| this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Change the visibility of the View without triggering any other changes. This is | |
| * important for transitions, where visibility changes should not adjust focus or | |
| * trigger a new layout. This is only used when the visibility has already been changed | |
| * and we need a transient value during an animation. When the animation completes, | |
| * the original visibility value is always restored. | |
| * | |
| * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. | |
| * @hide | |
| */ | |
| public void setTransitionVisibility(@Visibility int visibility) { | |
| mViewFlags = (mViewFlags & ~View.VISIBILITY_MASK) | visibility; | |
| } | |
| /** | |
| * Reset the flag indicating the accessibility state of the subtree rooted | |
| * at this view changed. | |
| */ | |
| void resetSubtreeAccessibilityStateChanged() { | |
| mPrivateFlags2 &= ~PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; | |
| } | |
| /** | |
| * Report an accessibility action to this view's parents for delegated processing. | |
| * | |
| * <p>Implementations of {@link #performAccessibilityAction(int, Bundle)} may internally | |
| * call this method to delegate an accessibility action to a supporting parent. If the parent | |
| * returns true from its | |
| * {@link ViewParent#onNestedPrePerformAccessibilityAction(View, int, android.os.Bundle)} | |
| * method this method will return true to signify that the action was consumed.</p> | |
| * | |
| * <p>This method is useful for implementing nested scrolling child views. If | |
| * {@link #isNestedScrollingEnabled()} returns true and the action is a scrolling action | |
| * a custom view implementation may invoke this method to allow a parent to consume the | |
| * scroll first. If this method returns true the custom view should skip its own scrolling | |
| * behavior.</p> | |
| * | |
| * @param action Accessibility action to delegate | |
| * @param arguments Optional action arguments | |
| * @return true if the action was consumed by a parent | |
| */ | |
| public boolean dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments) { | |
| for (ViewParent p = getParent(); p != null; p = p.getParent()) { | |
| if (p.onNestedPrePerformAccessibilityAction(this, action, arguments)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Performs the specified accessibility action on the view. For | |
| * possible accessibility actions look at {@link AccessibilityNodeInfo}. | |
| * <p> | |
| * If an {@link AccessibilityDelegate} has been specified via calling | |
| * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its | |
| * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} | |
| * is responsible for handling this call. | |
| * </p> | |
| * | |
| * <p>The default implementation will delegate | |
| * {@link AccessibilityNodeInfo#ACTION_SCROLL_BACKWARD} and | |
| * {@link AccessibilityNodeInfo#ACTION_SCROLL_FORWARD} to nested scrolling parents if | |
| * {@link #isNestedScrollingEnabled() nested scrolling is enabled} on this view.</p> | |
| * | |
| * @param action The action to perform. | |
| * @param arguments Optional action arguments. | |
| * @return Whether the action was performed. | |
| */ | |
| public boolean performAccessibilityAction(int action, Bundle arguments) { | |
| if (mAccessibilityDelegate != null) { | |
| return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); | |
| } else { | |
| return performAccessibilityActionInternal(action, arguments); | |
| } | |
| } | |
| /** | |
| * @see #performAccessibilityAction(int, Bundle) | |
| * | |
| * Note: Called from the default {@link AccessibilityDelegate}. | |
| * | |
| * @hide | |
| */ | |
| public boolean performAccessibilityActionInternal(int action, Bundle arguments) { | |
| if (isNestedScrollingEnabled() | |
| && (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD | |
| || action == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD | |
| || action == R.id.accessibilityActionScrollUp | |
| || action == R.id.accessibilityActionScrollLeft | |
| || action == R.id.accessibilityActionScrollDown | |
| || action == R.id.accessibilityActionScrollRight)) { | |
| if (dispatchNestedPrePerformAccessibilityAction(action, arguments)) { | |
| return true; | |
| } | |
| } | |
| switch (action) { | |
| case AccessibilityNodeInfo.ACTION_CLICK: { | |
| if (isClickable()) { | |
| performClick(); | |
| return true; | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_LONG_CLICK: { | |
| if (isLongClickable()) { | |
| performLongClick(); | |
| return true; | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_FOCUS: { | |
| if (!hasFocus()) { | |
| // Get out of touch mode since accessibility | |
| // wants to move focus around. | |
| getViewRootImpl().ensureTouchMode(false); | |
| return requestFocus(); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { | |
| if (hasFocus()) { | |
| clearFocus(); | |
| return !isFocused(); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_SELECT: { | |
| if (!isSelected()) { | |
| setSelected(true); | |
| return isSelected(); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { | |
| if (isSelected()) { | |
| setSelected(false); | |
| return !isSelected(); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { | |
| if (!isAccessibilityFocused()) { | |
| return requestAccessibilityFocus(); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { | |
| if (isAccessibilityFocused()) { | |
| clearAccessibilityFocus(); | |
| return true; | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { | |
| if (arguments != null) { | |
| final int granularity = arguments.getInt( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); | |
| final boolean extendSelection = arguments.getBoolean( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); | |
| return traverseAtGranularity(granularity, true, extendSelection); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { | |
| if (arguments != null) { | |
| final int granularity = arguments.getInt( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); | |
| final boolean extendSelection = arguments.getBoolean( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); | |
| return traverseAtGranularity(granularity, false, extendSelection); | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.ACTION_SET_SELECTION: { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text == null) { | |
| return false; | |
| } | |
| final int start = (arguments != null) ? arguments.getInt( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1; | |
| final int end = (arguments != null) ? arguments.getInt( | |
| AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1; | |
| // Only cursor position can be specified (selection length == 0) | |
| if ((getAccessibilitySelectionStart() != start | |
| || getAccessibilitySelectionEnd() != end) | |
| && (start == end)) { | |
| setAccessibilitySelection(start, end); | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| return true; | |
| } | |
| } break; | |
| case R.id.accessibilityActionShowOnScreen: { | |
| if (mAttachInfo != null) { | |
| final Rect r = mAttachInfo.mTmpInvalRect; | |
| getDrawingRect(r); | |
| return requestRectangleOnScreen(r, true); | |
| } | |
| } break; | |
| case R.id.accessibilityActionContextClick: { | |
| if (isContextClickable()) { | |
| performContextClick(); | |
| return true; | |
| } | |
| } break; | |
| } | |
| return false; | |
| } | |
| private boolean traverseAtGranularity(int granularity, boolean forward, | |
| boolean extendSelection) { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text == null || text.length() == 0) { | |
| return false; | |
| } | |
| TextSegmentIterator iterator = getIteratorForGranularity(granularity); | |
| if (iterator == null) { | |
| return false; | |
| } | |
| int current = getAccessibilitySelectionEnd(); | |
| if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { | |
| current = forward ? 0 : text.length(); | |
| } | |
| final int[] range = forward ? iterator.following(current) : iterator.preceding(current); | |
| if (range == null) { | |
| return false; | |
| } | |
| final int segmentStart = range[0]; | |
| final int segmentEnd = range[1]; | |
| int selectionStart; | |
| int selectionEnd; | |
| if (extendSelection && isAccessibilitySelectionExtendable()) { | |
| selectionStart = getAccessibilitySelectionStart(); | |
| if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { | |
| selectionStart = forward ? segmentStart : segmentEnd; | |
| } | |
| selectionEnd = forward ? segmentEnd : segmentStart; | |
| } else { | |
| selectionStart = selectionEnd= forward ? segmentEnd : segmentStart; | |
| } | |
| setAccessibilitySelection(selectionStart, selectionEnd); | |
| final int action = forward ? AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY | |
| : AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY; | |
| sendViewTextTraversedAtGranularityEvent(action, granularity, segmentStart, segmentEnd); | |
| return true; | |
| } | |
| /** | |
| * Gets the text reported for accessibility purposes. | |
| * | |
| * @return The accessibility text. | |
| * | |
| * @hide | |
| */ | |
| public CharSequence getIterableTextForAccessibility() { | |
| return getContentDescription(); | |
| } | |
| /** | |
| * Gets whether accessibility selection can be extended. | |
| * | |
| * @return If selection is extensible. | |
| * | |
| * @hide | |
| */ | |
| public boolean isAccessibilitySelectionExtendable() { | |
| return false; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public int getAccessibilitySelectionStart() { | |
| return mAccessibilityCursorPosition; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public int getAccessibilitySelectionEnd() { | |
| return getAccessibilitySelectionStart(); | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public void setAccessibilitySelection(int start, int end) { | |
| if (start == end && end == mAccessibilityCursorPosition) { | |
| return; | |
| } | |
| if (start >= 0 && start == end && end <= getIterableTextForAccessibility().length()) { | |
| mAccessibilityCursorPosition = start; | |
| } else { | |
| mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; | |
| } | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED); | |
| } | |
| private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, | |
| int fromIndex, int toIndex) { | |
| if (mParent == null) { | |
| return; | |
| } | |
| AccessibilityEvent event = AccessibilityEvent.obtain( | |
| AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); | |
| onInitializeAccessibilityEvent(event); | |
| onPopulateAccessibilityEvent(event); | |
| event.setFromIndex(fromIndex); | |
| event.setToIndex(toIndex); | |
| event.setAction(action); | |
| event.setMovementGranularity(granularity); | |
| mParent.requestSendAccessibilityEvent(this, event); | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public TextSegmentIterator getIteratorForGranularity(int granularity) { | |
| switch (granularity) { | |
| case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text != null && text.length() > 0) { | |
| CharacterTextSegmentIterator iterator = | |
| CharacterTextSegmentIterator.getInstance( | |
| mContext.getResources().getConfiguration().locale); | |
| iterator.initialize(text.toString()); | |
| return iterator; | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text != null && text.length() > 0) { | |
| WordTextSegmentIterator iterator = | |
| WordTextSegmentIterator.getInstance( | |
| mContext.getResources().getConfiguration().locale); | |
| iterator.initialize(text.toString()); | |
| return iterator; | |
| } | |
| } break; | |
| case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { | |
| CharSequence text = getIterableTextForAccessibility(); | |
| if (text != null && text.length() > 0) { | |
| ParagraphTextSegmentIterator iterator = | |
| ParagraphTextSegmentIterator.getInstance(); | |
| iterator.initialize(text.toString()); | |
| return iterator; | |
| } | |
| } break; | |
| } | |
| return null; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public void dispatchStartTemporaryDetach() { | |
| onStartTemporaryDetach(); | |
| } | |
| /** | |
| * This is called when a container is going to temporarily detach a child, with | |
| * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. | |
| * It will either be followed by {@link #onFinishTemporaryDetach()} or | |
| * {@link #onDetachedFromWindow()} when the container is done. | |
| */ | |
| public void onStartTemporaryDetach() { | |
| removeUnsetPressCallback(); | |
| mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public void dispatchFinishTemporaryDetach() { | |
| onFinishTemporaryDetach(); | |
| } | |
| /** | |
| * Called after {@link #onStartTemporaryDetach} when the container is done | |
| * changing the view. | |
| */ | |
| public void onFinishTemporaryDetach() { | |
| } | |
| /** | |
| * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} | |
| * for this view's window. Returns null if the view is not currently attached | |
| * to the window. Normally you will not need to use this directly, but | |
| * just use the standard high-level event callbacks like | |
| * {@link #onKeyDown(int, KeyEvent)}. | |
| */ | |
| public KeyEvent.DispatcherState getKeyDispatcherState() { | |
| return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; | |
| } | |
| /** | |
| * Dispatch a key event before it is processed by any input method | |
| * associated with the view hierarchy. This can be used to intercept | |
| * key events in special situations before the IME consumes them; a | |
| * typical example would be handling the BACK key to update the application's | |
| * UI instead of allowing the IME to see it and close itself. | |
| * | |
| * @param event The key event to be dispatched. | |
| * @return True if the event was handled, false otherwise. | |
| */ | |
| public boolean dispatchKeyEventPreIme(KeyEvent event) { | |
| return onKeyPreIme(event.getKeyCode(), event); | |
| } | |
| /** | |
| * Dispatch a key event to the next view on the focus path. This path runs | |
| * from the top of the view tree down to the currently focused view. If this | |
| * view has focus, it will dispatch to itself. Otherwise it will dispatch | |
| * the next node down the focus path. This method also fires any key | |
| * listeners. | |
| * | |
| * @param event The key event to be dispatched. | |
| * @return True if the event was handled, false otherwise. | |
| */ | |
| public boolean dispatchKeyEvent(KeyEvent event) { | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onKeyEvent(event, 0); | |
| } | |
| // Give any attached key listener a first crack at the event. | |
| //noinspection SimplifiableIfStatement | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED | |
| && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { | |
| return true; | |
| } | |
| if (event.dispatch(this, mAttachInfo != null | |
| ? mAttachInfo.mKeyDispatchState : null, this)) { | |
| return true; | |
| } | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dispatches a key shortcut event. | |
| * | |
| * @param event The key event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| public boolean dispatchKeyShortcutEvent(KeyEvent event) { | |
| return onKeyShortcut(event.getKeyCode(), event); | |
| } | |
| /** | |
| * Pass the touch screen motion event down to the target view, or this | |
| * view if it is the target. | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| public boolean dispatchTouchEvent(MotionEvent event) { | |
| // If the event should be handled by accessibility focus first. | |
| if (event.isTargetAccessibilityFocus()) { | |
| // We don't have focus or no virtual descendant has it, do not handle the event. | |
| if (!isAccessibilityFocusedViewOrHost()) { | |
| return false; | |
| } | |
| // We have focus and got the event, then use normal event dispatch. | |
| event.setTargetAccessibilityFocus(false); | |
| } | |
| boolean result = false; | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onTouchEvent(event, 0); | |
| } | |
| final int actionMasked = event.getActionMasked(); | |
| if (actionMasked == MotionEvent.ACTION_DOWN) { | |
| // Defensive cleanup for new gesture | |
| stopNestedScroll(); | |
| } | |
| if (onFilterTouchEventForSecurity(event)) { | |
| //noinspection SimplifiableIfStatement | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnTouchListener != null | |
| && (mViewFlags & ENABLED_MASK) == ENABLED | |
| && li.mOnTouchListener.onTouch(this, event)) { | |
| result = true; | |
| } | |
| if (!result && onTouchEvent(event)) { | |
| result = true; | |
| } | |
| } | |
| if (!result && mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); | |
| } | |
| // Clean up after nested scrolls if this is the end of a gesture; | |
| // also cancel it if we tried an ACTION_DOWN but we didn't want the rest | |
| // of the gesture. | |
| if (actionMasked == MotionEvent.ACTION_UP || | |
| actionMasked == MotionEvent.ACTION_CANCEL || | |
| (actionMasked == MotionEvent.ACTION_DOWN && !result)) { | |
| stopNestedScroll(); | |
| } | |
| return result; | |
| } | |
| boolean isAccessibilityFocusedViewOrHost() { | |
| return isAccessibilityFocused() || (getViewRootImpl() != null && getViewRootImpl() | |
| .getAccessibilityFocusedHost() == this); | |
| } | |
| /** | |
| * Filter the touch event to apply security policies. | |
| * | |
| * @param event The motion event to be filtered. | |
| * @return True if the event should be dispatched, false if the event should be dropped. | |
| * | |
| * @see #getFilterTouchesWhenObscured | |
| */ | |
| public boolean onFilterTouchEventForSecurity(MotionEvent event) { | |
| //noinspection RedundantIfStatement | |
| if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 | |
| && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { | |
| // Window is obscured, drop this touch. | |
| return false; | |
| } | |
| return true; | |
| } | |
| /** | |
| * Pass a trackball motion event down to the focused view. | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| public boolean dispatchTrackballEvent(MotionEvent event) { | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onTrackballEvent(event, 0); | |
| } | |
| return onTrackballEvent(event); | |
| } | |
| /** | |
| * Dispatch a generic motion event. | |
| * <p> | |
| * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} | |
| * are delivered to the view under the pointer. All other generic motion events are | |
| * delivered to the focused view. Hover events are handled specially and are delivered | |
| * to {@link #onHoverEvent(MotionEvent)}. | |
| * </p> | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| public boolean dispatchGenericMotionEvent(MotionEvent event) { | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); | |
| } | |
| final int source = event.getSource(); | |
| if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { | |
| final int action = event.getAction(); | |
| if (action == MotionEvent.ACTION_HOVER_ENTER | |
| || action == MotionEvent.ACTION_HOVER_MOVE | |
| || action == MotionEvent.ACTION_HOVER_EXIT) { | |
| if (dispatchHoverEvent(event)) { | |
| return true; | |
| } | |
| } else if (dispatchGenericPointerEvent(event)) { | |
| return true; | |
| } | |
| } else if (dispatchGenericFocusedEvent(event)) { | |
| return true; | |
| } | |
| if (dispatchGenericMotionEventInternal(event)) { | |
| return true; | |
| } | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); | |
| } | |
| return false; | |
| } | |
| private boolean dispatchGenericMotionEventInternal(MotionEvent event) { | |
| //noinspection SimplifiableIfStatement | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnGenericMotionListener != null | |
| && (mViewFlags & ENABLED_MASK) == ENABLED | |
| && li.mOnGenericMotionListener.onGenericMotion(this, event)) { | |
| return true; | |
| } | |
| if (onGenericMotionEvent(event)) { | |
| return true; | |
| } | |
| final int actionButton = event.getActionButton(); | |
| switch (event.getActionMasked()) { | |
| case MotionEvent.ACTION_BUTTON_PRESS: | |
| if (isContextClickable() && !mInContextButtonPress && !mHasPerformedLongPress | |
| && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY | |
| || actionButton == MotionEvent.BUTTON_SECONDARY)) { | |
| if (performContextClick()) { | |
| mInContextButtonPress = true; | |
| setPressed(true, event.getX(), event.getY()); | |
| removeTapCallback(); | |
| removeLongPressCallback(); | |
| return true; | |
| } | |
| } | |
| break; | |
| case MotionEvent.ACTION_BUTTON_RELEASE: | |
| if (mInContextButtonPress && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY | |
| || actionButton == MotionEvent.BUTTON_SECONDARY)) { | |
| mInContextButtonPress = false; | |
| mIgnoreNextUpEvent = true; | |
| } | |
| break; | |
| } | |
| if (mInputEventConsistencyVerifier != null) { | |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dispatch a hover event. | |
| * <p> | |
| * Do not call this method directly. | |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. | |
| * </p> | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| protected boolean dispatchHoverEvent(MotionEvent event) { | |
| ListenerInfo li = mListenerInfo; | |
| //noinspection SimplifiableIfStatement | |
| if (li != null && li.mOnHoverListener != null | |
| && (mViewFlags & ENABLED_MASK) == ENABLED | |
| && li.mOnHoverListener.onHover(this, event)) { | |
| return true; | |
| } | |
| return onHoverEvent(event); | |
| } | |
| /** | |
| * Returns true if the view has a child to which it has recently sent | |
| * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and | |
| * it does not have a hovered child, then it must be the innermost hovered view. | |
| * @hide | |
| */ | |
| protected boolean hasHoveredChild() { | |
| return false; | |
| } | |
| /** | |
| * Dispatch a generic motion event to the view under the first pointer. | |
| * <p> | |
| * Do not call this method directly. | |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. | |
| * </p> | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| protected boolean dispatchGenericPointerEvent(MotionEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Dispatch a generic motion event to the currently focused view. | |
| * <p> | |
| * Do not call this method directly. | |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. | |
| * </p> | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| */ | |
| protected boolean dispatchGenericFocusedEvent(MotionEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Dispatch a pointer event. | |
| * <p> | |
| * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all | |
| * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns | |
| * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches | |
| * and should not be expected to handle other pointing device features. | |
| * </p> | |
| * | |
| * @param event The motion event to be dispatched. | |
| * @return True if the event was handled by the view, false otherwise. | |
| * @hide | |
| */ | |
| public final boolean dispatchPointerEvent(MotionEvent event) { | |
| if (event.isTouchEvent()) { | |
| return dispatchTouchEvent(event); | |
| } else { | |
| return dispatchGenericMotionEvent(event); | |
| } | |
| } | |
| /** | |
| * Called when the window containing this view gains or loses window focus. | |
| * ViewGroups should override to route to their children. | |
| * | |
| * @param hasFocus True if the window containing this view now has focus, | |
| * false otherwise. | |
| */ | |
| public void dispatchWindowFocusChanged(boolean hasFocus) { | |
| onWindowFocusChanged(hasFocus); | |
| } | |
| /** | |
| * Called when the window containing this view gains or loses focus. Note | |
| * that this is separate from view focus: to receive key events, both | |
| * your view and its window must have focus. If a window is displayed | |
| * on top of yours that takes input focus, then your own window will lose | |
| * focus but the view focus will remain unchanged. | |
| * | |
| * @param hasWindowFocus True if the window containing this view now has | |
| * focus, false otherwise. | |
| */ | |
| public void onWindowFocusChanged(boolean hasWindowFocus) { | |
| InputMethodManager imm = InputMethodManager.peekInstance(); | |
| if (!hasWindowFocus) { | |
| if (isPressed()) { | |
| setPressed(false); | |
| } | |
| if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { | |
| imm.focusOut(this); | |
| } | |
| removeLongPressCallback(); | |
| removeTapCallback(); | |
| onFocusLost(); | |
| } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { | |
| imm.focusIn(this); | |
| } | |
| refreshDrawableState(); | |
| } | |
| /** | |
| * Returns true if this view is in a window that currently has window focus. | |
| * Note that this is not the same as the view itself having focus. | |
| * | |
| * @return True if this view is in a window that currently has window focus. | |
| */ | |
| public boolean hasWindowFocus() { | |
| return mAttachInfo != null && mAttachInfo.mHasWindowFocus; | |
| } | |
| /** | |
| * Dispatch a view visibility change down the view hierarchy. | |
| * ViewGroups should override to route to their children. | |
| * @param changedView The view whose visibility changed. Could be 'this' or | |
| * an ancestor view. | |
| * @param visibility The new visibility of changedView: {@link #VISIBLE}, | |
| * {@link #INVISIBLE} or {@link #GONE}. | |
| */ | |
| protected void dispatchVisibilityChanged(@NonNull View changedView, | |
| @Visibility int visibility) { | |
| onVisibilityChanged(changedView, visibility); | |
| } | |
| /** | |
| * Called when the visibility of the view or an ancestor of the view has | |
| * changed. | |
| * | |
| * @param changedView The view whose visibility changed. May be | |
| * {@code this} or an ancestor view. | |
| * @param visibility The new visibility, one of {@link #VISIBLE}, | |
| * {@link #INVISIBLE} or {@link #GONE}. | |
| */ | |
| protected void onVisibilityChanged(@NonNull View changedView, @Visibility int visibility) { | |
| final boolean visible = visibility == VISIBLE && getVisibility() == VISIBLE; | |
| if (visible && mAttachInfo != null) { | |
| initialAwakenScrollBars(); | |
| } | |
| final Drawable dr = mBackground; | |
| if (dr != null && visible != dr.isVisible()) { | |
| dr.setVisible(visible, false); | |
| } | |
| final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; | |
| if (fg != null && visible != fg.isVisible()) { | |
| fg.setVisible(visible, false); | |
| } | |
| } | |
| /** | |
| * Dispatch a hint about whether this view is displayed. For instance, when | |
| * a View moves out of the screen, it might receives a display hint indicating | |
| * the view is not displayed. Applications should not <em>rely</em> on this hint | |
| * as there is no guarantee that they will receive one. | |
| * | |
| * @param hint A hint about whether or not this view is displayed: | |
| * {@link #VISIBLE} or {@link #INVISIBLE}. | |
| */ | |
| public void dispatchDisplayHint(@Visibility int hint) { | |
| onDisplayHint(hint); | |
| } | |
| /** | |
| * Gives this view a hint about whether is displayed or not. For instance, when | |
| * a View moves out of the screen, it might receives a display hint indicating | |
| * the view is not displayed. Applications should not <em>rely</em> on this hint | |
| * as there is no guarantee that they will receive one. | |
| * | |
| * @param hint A hint about whether or not this view is displayed: | |
| * {@link #VISIBLE} or {@link #INVISIBLE}. | |
| */ | |
| protected void onDisplayHint(@Visibility int hint) { | |
| } | |
| /** | |
| * Dispatch a window visibility change down the view hierarchy. | |
| * ViewGroups should override to route to their children. | |
| * | |
| * @param visibility The new visibility of the window. | |
| * | |
| * @see #onWindowVisibilityChanged(int) | |
| */ | |
| public void dispatchWindowVisibilityChanged(@Visibility int visibility) { | |
| onWindowVisibilityChanged(visibility); | |
| } | |
| /** | |
| * Called when the window containing has change its visibility | |
| * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note | |
| * that this tells you whether or not your window is being made visible | |
| * to the window manager; this does <em>not</em> tell you whether or not | |
| * your window is obscured by other windows on the screen, even if it | |
| * is itself visible. | |
| * | |
| * @param visibility The new visibility of the window. | |
| */ | |
| protected void onWindowVisibilityChanged(@Visibility int visibility) { | |
| if (visibility == VISIBLE) { | |
| initialAwakenScrollBars(); | |
| } | |
| } | |
| /** | |
| * Returns the current visibility of the window this view is attached to | |
| * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). | |
| * | |
| * @return Returns the current visibility of the view's window. | |
| */ | |
| @Visibility | |
| public int getWindowVisibility() { | |
| return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; | |
| } | |
| /** | |
| * Retrieve the overall visible display size in which the window this view is | |
| * attached to has been positioned in. This takes into account screen | |
| * decorations above the window, for both cases where the window itself | |
| * is being position inside of them or the window is being placed under | |
| * then and covered insets are used for the window to position its content | |
| * inside. In effect, this tells you the available area where content can | |
| * be placed and remain visible to users. | |
| * | |
| * <p>This function requires an IPC back to the window manager to retrieve | |
| * the requested information, so should not be used in performance critical | |
| * code like drawing. | |
| * | |
| * @param outRect Filled in with the visible display frame. If the view | |
| * is not attached to a window, this is simply the raw display size. | |
| */ | |
| public void getWindowVisibleDisplayFrame(Rect outRect) { | |
| if (mAttachInfo != null) { | |
| try { | |
| mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); | |
| } catch (RemoteException e) { | |
| return; | |
| } | |
| // XXX This is really broken, and probably all needs to be done | |
| // in the window manager, and we need to know more about whether | |
| // we want the area behind or in front of the IME. | |
| final Rect insets = mAttachInfo.mVisibleInsets; | |
| outRect.left += insets.left; | |
| outRect.top += insets.top; | |
| outRect.right -= insets.right; | |
| outRect.bottom -= insets.bottom; | |
| return; | |
| } | |
| // The view is not attached to a display so we don't have a context. | |
| // Make a best guess about the display size. | |
| Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); | |
| d.getRectSize(outRect); | |
| } | |
| /** | |
| * Dispatch a notification about a resource configuration change down | |
| * the view hierarchy. | |
| * ViewGroups should override to route to their children. | |
| * | |
| * @param newConfig The new resource configuration. | |
| * | |
| * @see #onConfigurationChanged(android.content.res.Configuration) | |
| */ | |
| public void dispatchConfigurationChanged(Configuration newConfig) { | |
| onConfigurationChanged(newConfig); | |
| } | |
| /** | |
| * Called when the current configuration of the resources being used | |
| * by the application have changed. You can use this to decide when | |
| * to reload resources that can changed based on orientation and other | |
| * configuration characteristics. You only need to use this if you are | |
| * not relying on the normal {@link android.app.Activity} mechanism of | |
| * recreating the activity instance upon a configuration change. | |
| * | |
| * @param newConfig The new resource configuration. | |
| */ | |
| protected void onConfigurationChanged(Configuration newConfig) { | |
| } | |
| /** | |
| * Private function to aggregate all per-view attributes in to the view | |
| * root. | |
| */ | |
| void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { | |
| performCollectViewAttributes(attachInfo, visibility); | |
| } | |
| void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { | |
| if ((visibility & VISIBILITY_MASK) == VISIBLE) { | |
| if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { | |
| attachInfo.mKeepScreenOn = true; | |
| } | |
| attachInfo.mSystemUiVisibility |= mSystemUiVisibility; | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { | |
| attachInfo.mHasSystemUiListeners = true; | |
| } | |
| } | |
| } | |
| void needGlobalAttributesUpdate(boolean force) { | |
| final AttachInfo ai = mAttachInfo; | |
| if (ai != null && !ai.mRecomputeGlobalAttributes) { | |
| if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) | |
| || ai.mHasSystemUiListeners) { | |
| ai.mRecomputeGlobalAttributes = true; | |
| } | |
| } | |
| } | |
| /** | |
| * Returns whether the device is currently in touch mode. Touch mode is entered | |
| * once the user begins interacting with the device by touch, and affects various | |
| * things like whether focus is always visible to the user. | |
| * | |
| * @return Whether the device is in touch mode. | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isInTouchMode() { | |
| if (mAttachInfo != null) { | |
| return mAttachInfo.mInTouchMode; | |
| } else { | |
| return ViewRootImpl.isInTouchMode(); | |
| } | |
| } | |
| /** | |
| * Returns the context the view is running in, through which it can | |
| * access the current theme, resources, etc. | |
| * | |
| * @return The view's Context. | |
| */ | |
| @ViewDebug.CapturedViewProperty | |
| public final Context getContext() { | |
| return mContext; | |
| } | |
| /** | |
| * Handle a key event before it is processed by any input method | |
| * associated with the view hierarchy. This can be used to intercept | |
| * key events in special situations before the IME consumes them; a | |
| * typical example would be handling the BACK key to update the application's | |
| * UI instead of allowing the IME to see it and close itself. | |
| * | |
| * @param keyCode The value in event.getKeyCode(). | |
| * @param event Description of the key event. | |
| * @return If you handled the event, return true. If you want to allow the | |
| * event to be handled by the next receiver, return false. | |
| */ | |
| public boolean onKeyPreIme(int keyCode, KeyEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) | |
| * KeyEvent.Callback.onKeyDown()}: perform press of the view | |
| * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} | |
| * is released, if the view is enabled and clickable. | |
| * | |
| * <p>Key presses in software keyboards will generally NOT trigger this listener, | |
| * although some may elect to do so in some situations. Do not rely on this to | |
| * catch software key presses. | |
| * | |
| * @param keyCode A key code that represents the button pressed, from | |
| * {@link android.view.KeyEvent}. | |
| * @param event The KeyEvent object that defines the button action. | |
| */ | |
| public boolean onKeyDown(int keyCode, KeyEvent event) { | |
| boolean result = false; | |
| if (KeyEvent.isConfirmKey(keyCode)) { | |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { | |
| return true; | |
| } | |
| // Long clickable items don't necessarily have to be clickable | |
| if (((mViewFlags & CLICKABLE) == CLICKABLE || | |
| (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && | |
| (event.getRepeatCount() == 0)) { | |
| setPressed(true); | |
| checkForLongClick(0); | |
| return true; | |
| } | |
| } | |
| return result; | |
| } | |
| /** | |
| * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) | |
| * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle | |
| * the event). | |
| * <p>Key presses in software keyboards will generally NOT trigger this listener, | |
| * although some may elect to do so in some situations. Do not rely on this to | |
| * catch software key presses. | |
| */ | |
| public boolean onKeyLongPress(int keyCode, KeyEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) | |
| * KeyEvent.Callback.onKeyUp()}: perform clicking of the view | |
| * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or | |
| * {@link KeyEvent#KEYCODE_ENTER} is released. | |
| * <p>Key presses in software keyboards will generally NOT trigger this listener, | |
| * although some may elect to do so in some situations. Do not rely on this to | |
| * catch software key presses. | |
| * | |
| * @param keyCode A key code that represents the button pressed, from | |
| * {@link android.view.KeyEvent}. | |
| * @param event The KeyEvent object that defines the button action. | |
| */ | |
| public boolean onKeyUp(int keyCode, KeyEvent event) { | |
| if (KeyEvent.isConfirmKey(keyCode)) { | |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { | |
| return true; | |
| } | |
| if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { | |
| setPressed(false); | |
| if (!mHasPerformedLongPress) { | |
| // This is a tap, so remove the longpress check | |
| removeLongPressCallback(); | |
| return performClick(); | |
| } | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) | |
| * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle | |
| * the event). | |
| * <p>Key presses in software keyboards will generally NOT trigger this listener, | |
| * although some may elect to do so in some situations. Do not rely on this to | |
| * catch software key presses. | |
| * | |
| * @param keyCode A key code that represents the button pressed, from | |
| * {@link android.view.KeyEvent}. | |
| * @param repeatCount The number of times the action was made. | |
| * @param event The KeyEvent object that defines the button action. | |
| */ | |
| public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Called on the focused view when a key shortcut event is not handled. | |
| * Override this method to implement local key shortcuts for the View. | |
| * Key shortcuts can also be implemented by setting the | |
| * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. | |
| * | |
| * @param keyCode The value in event.getKeyCode(). | |
| * @param event Description of the key event. | |
| * @return If you handled the event, return true. If you want to allow the | |
| * event to be handled by the next receiver, return false. | |
| */ | |
| public boolean onKeyShortcut(int keyCode, KeyEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Check whether the called view is a text editor, in which case it | |
| * would make sense to automatically display a soft input window for | |
| * it. Subclasses should override this if they implement | |
| * {@link #onCreateInputConnection(EditorInfo)} to return true if | |
| * a call on that method would return a non-null InputConnection, and | |
| * they are really a first-class editor that the user would normally | |
| * start typing on when the go into a window containing your view. | |
| * | |
| * <p>The default implementation always returns false. This does | |
| * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} | |
| * will not be called or the user can not otherwise perform edits on your | |
| * view; it is just a hint to the system that this is not the primary | |
| * purpose of this view. | |
| * | |
| * @return Returns true if this view is a text editor, else false. | |
| */ | |
| public boolean onCheckIsTextEditor() { | |
| return false; | |
| } | |
| /** | |
| * Create a new InputConnection for an InputMethod to interact | |
| * with the view. The default implementation returns null, since it doesn't | |
| * support input methods. You can override this to implement such support. | |
| * This is only needed for views that take focus and text input. | |
| * | |
| * <p>When implementing this, you probably also want to implement | |
| * {@link #onCheckIsTextEditor()} to indicate you will return a | |
| * non-null InputConnection.</p> | |
| * | |
| * <p>Also, take good care to fill in the {@link android.view.inputmethod.EditorInfo} | |
| * object correctly and in its entirety, so that the connected IME can rely | |
| * on its values. For example, {@link android.view.inputmethod.EditorInfo#initialSelStart} | |
| * and {@link android.view.inputmethod.EditorInfo#initialSelEnd} members | |
| * must be filled in with the correct cursor position for IMEs to work correctly | |
| * with your application.</p> | |
| * | |
| * @param outAttrs Fill in with attribute information about the connection. | |
| */ | |
| public InputConnection onCreateInputConnection(EditorInfo outAttrs) { | |
| return null; | |
| } | |
| /** | |
| * Called by the {@link android.view.inputmethod.InputMethodManager} | |
| * when a view who is not the current | |
| * input connection target is trying to make a call on the manager. The | |
| * default implementation returns false; you can override this to return | |
| * true for certain views if you are performing InputConnection proxying | |
| * to them. | |
| * @param view The View that is making the InputMethodManager call. | |
| * @return Return true to allow the call, false to reject. | |
| */ | |
| public boolean checkInputConnectionProxy(View view) { | |
| return false; | |
| } | |
| /** | |
| * Show the context menu for this view. It is not safe to hold on to the | |
| * menu after returning from this method. | |
| * | |
| * You should normally not overload this method. Overload | |
| * {@link #onCreateContextMenu(ContextMenu)} or define an | |
| * {@link OnCreateContextMenuListener} to add items to the context menu. | |
| * | |
| * @param menu The context menu to populate | |
| */ | |
| public void createContextMenu(ContextMenu menu) { | |
| ContextMenuInfo menuInfo = getContextMenuInfo(); | |
| // Sets the current menu info so all items added to menu will have | |
| // my extra info set. | |
| ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); | |
| onCreateContextMenu(menu); | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnCreateContextMenuListener != null) { | |
| li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); | |
| } | |
| // Clear the extra information so subsequent items that aren't mine don't | |
| // have my extra info. | |
| ((MenuBuilder)menu).setCurrentMenuInfo(null); | |
| if (mParent != null) { | |
| mParent.createContextMenu(menu); | |
| } | |
| } | |
| /** | |
| * Views should implement this if they have extra information to associate | |
| * with the context menu. The return result is supplied as a parameter to | |
| * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} | |
| * callback. | |
| * | |
| * @return Extra information about the item for which the context menu | |
| * should be shown. This information will vary across different | |
| * subclasses of View. | |
| */ | |
| protected ContextMenuInfo getContextMenuInfo() { | |
| return null; | |
| } | |
| /** | |
| * Views should implement this if the view itself is going to add items to | |
| * the context menu. | |
| * | |
| * @param menu the context menu to populate | |
| */ | |
| protected void onCreateContextMenu(ContextMenu menu) { | |
| } | |
| /** | |
| * Implement this method to handle trackball motion events. The | |
| * <em>relative</em> movement of the trackball since the last event | |
| * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and | |
| * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so | |
| * that a movement of 1 corresponds to the user pressing one DPAD key (so | |
| * they will often be fractional values, representing the more fine-grained | |
| * movement information available from a trackball). | |
| * | |
| * @param event The motion event. | |
| * @return True if the event was handled, false otherwise. | |
| */ | |
| public boolean onTrackballEvent(MotionEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Implement this method to handle generic motion events. | |
| * <p> | |
| * Generic motion events describe joystick movements, mouse hovers, track pad | |
| * touches, scroll wheel movements and other input events. The | |
| * {@link MotionEvent#getSource() source} of the motion event specifies | |
| * the class of input that was received. Implementations of this method | |
| * must examine the bits in the source before processing the event. | |
| * The following code example shows how this is done. | |
| * </p><p> | |
| * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} | |
| * are delivered to the view under the pointer. All other generic motion events are | |
| * delivered to the focused view. | |
| * </p> | |
| * <pre> public boolean onGenericMotionEvent(MotionEvent event) { | |
| * if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) { | |
| * if (event.getAction() == MotionEvent.ACTION_MOVE) { | |
| * // process the joystick movement... | |
| * return true; | |
| * } | |
| * } | |
| * if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { | |
| * switch (event.getAction()) { | |
| * case MotionEvent.ACTION_HOVER_MOVE: | |
| * // process the mouse hover movement... | |
| * return true; | |
| * case MotionEvent.ACTION_SCROLL: | |
| * // process the scroll wheel movement... | |
| * return true; | |
| * } | |
| * } | |
| * return super.onGenericMotionEvent(event); | |
| * }</pre> | |
| * | |
| * @param event The generic motion event being processed. | |
| * @return True if the event was handled, false otherwise. | |
| */ | |
| public boolean onGenericMotionEvent(MotionEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Implement this method to handle hover events. | |
| * <p> | |
| * This method is called whenever a pointer is hovering into, over, or out of the | |
| * bounds of a view and the view is not currently being touched. | |
| * Hover events are represented as pointer events with action | |
| * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, | |
| * or {@link MotionEvent#ACTION_HOVER_EXIT}. | |
| * </p> | |
| * <ul> | |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} | |
| * when the pointer enters the bounds of the view.</li> | |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} | |
| * when the pointer has already entered the bounds of the view and has moved.</li> | |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} | |
| * when the pointer has exited the bounds of the view or when the pointer is | |
| * about to go down due to a button click, tap, or similar user action that | |
| * causes the view to be touched.</li> | |
| * </ul> | |
| * <p> | |
| * The view should implement this method to return true to indicate that it is | |
| * handling the hover event, such as by changing its drawable state. | |
| * </p><p> | |
| * The default implementation calls {@link #setHovered} to update the hovered state | |
| * of the view when a hover enter or hover exit event is received, if the view | |
| * is enabled and is clickable. The default implementation also sends hover | |
| * accessibility events. | |
| * </p> | |
| * | |
| * @param event The motion event that describes the hover. | |
| * @return True if the view handled the hover event. | |
| * | |
| * @see #isHovered | |
| * @see #setHovered | |
| * @see #onHoverChanged | |
| */ | |
| public boolean onHoverEvent(MotionEvent event) { | |
| // The root view may receive hover (or touch) events that are outside the bounds of | |
| // the window. This code ensures that we only send accessibility events for | |
| // hovers that are actually within the bounds of the root view. | |
| final int action = event.getActionMasked(); | |
| if (!mSendingHoverAccessibilityEvents) { | |
| if ((action == MotionEvent.ACTION_HOVER_ENTER | |
| || action == MotionEvent.ACTION_HOVER_MOVE) | |
| && !hasHoveredChild() | |
| && pointInView(event.getX(), event.getY())) { | |
| sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); | |
| mSendingHoverAccessibilityEvents = true; | |
| } | |
| } else { | |
| if (action == MotionEvent.ACTION_HOVER_EXIT | |
| || (action == MotionEvent.ACTION_MOVE | |
| && !pointInView(event.getX(), event.getY()))) { | |
| mSendingHoverAccessibilityEvents = false; | |
| sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); | |
| } | |
| } | |
| if (isHoverable()) { | |
| switch (action) { | |
| case MotionEvent.ACTION_HOVER_ENTER: | |
| setHovered(true); | |
| break; | |
| case MotionEvent.ACTION_HOVER_EXIT: | |
| setHovered(false); | |
| break; | |
| } | |
| // Dispatch the event to onGenericMotionEvent before returning true. | |
| // This is to provide compatibility with existing applications that | |
| // handled HOVER_MOVE events in onGenericMotionEvent and that would | |
| // break because of the new default handling for hoverable views | |
| // in onHoverEvent. | |
| // Note that onGenericMotionEvent will be called by default when | |
| // onHoverEvent returns false (refer to dispatchGenericMotionEvent). | |
| dispatchGenericMotionEventInternal(event); | |
| // The event was already handled by calling setHovered(), so always | |
| // return true. | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Returns true if the view should handle {@link #onHoverEvent} | |
| * by calling {@link #setHovered} to change its hovered state. | |
| * | |
| * @return True if the view is hoverable. | |
| */ | |
| private boolean isHoverable() { | |
| final int viewFlags = mViewFlags; | |
| if ((viewFlags & ENABLED_MASK) == DISABLED) { | |
| return false; | |
| } | |
| return (viewFlags & CLICKABLE) == CLICKABLE | |
| || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE | |
| || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; | |
| } | |
| /** | |
| * Returns true if the view is currently hovered. | |
| * | |
| * @return True if the view is currently hovered. | |
| * | |
| * @see #setHovered | |
| * @see #onHoverChanged | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isHovered() { | |
| return (mPrivateFlags & PFLAG_HOVERED) != 0; | |
| } | |
| /** | |
| * Sets whether the view is currently hovered. | |
| * <p> | |
| * Calling this method also changes the drawable state of the view. This | |
| * enables the view to react to hover by using different drawable resources | |
| * to change its appearance. | |
| * </p><p> | |
| * The {@link #onHoverChanged} method is called when the hovered state changes. | |
| * </p> | |
| * | |
| * @param hovered True if the view is hovered. | |
| * | |
| * @see #isHovered | |
| * @see #onHoverChanged | |
| */ | |
| public void setHovered(boolean hovered) { | |
| if (hovered) { | |
| if ((mPrivateFlags & PFLAG_HOVERED) == 0) { | |
| mPrivateFlags |= PFLAG_HOVERED; | |
| refreshDrawableState(); | |
| onHoverChanged(true); | |
| } | |
| } else { | |
| if ((mPrivateFlags & PFLAG_HOVERED) != 0) { | |
| mPrivateFlags &= ~PFLAG_HOVERED; | |
| refreshDrawableState(); | |
| onHoverChanged(false); | |
| } | |
| } | |
| } | |
| /** | |
| * Implement this method to handle hover state changes. | |
| * <p> | |
| * This method is called whenever the hover state changes as a result of a | |
| * call to {@link #setHovered}. | |
| * </p> | |
| * | |
| * @param hovered The current hover state, as returned by {@link #isHovered}. | |
| * | |
| * @see #isHovered | |
| * @see #setHovered | |
| */ | |
| public void onHoverChanged(boolean hovered) { | |
| } | |
| /** | |
| * Implement this method to handle touch screen motion events. | |
| * <p> | |
| * If this method is used to detect click actions, it is recommended that | |
| * the actions be performed by implementing and calling | |
| * {@link #performClick()}. This will ensure consistent system behavior, | |
| * including: | |
| * <ul> | |
| * <li>obeying click sound preferences | |
| * <li>dispatching OnClickListener calls | |
| * <li>handling {@link AccessibilityNodeInfo#ACTION_CLICK ACTION_CLICK} when | |
| * accessibility features are enabled | |
| * </ul> | |
| * | |
| * @param event The motion event. | |
| * @return True if the event was handled, false otherwise. | |
| */ | |
| public boolean onTouchEvent(MotionEvent event) { | |
| final float x = event.getX(); | |
| final float y = event.getY(); | |
| final int viewFlags = mViewFlags; | |
| final int action = event.getAction(); | |
| if ((viewFlags & ENABLED_MASK) == DISABLED) { | |
| if (action == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { | |
| setPressed(false); | |
| } | |
| // A disabled view that is clickable still consumes the touch | |
| // events, it just doesn't respond to them. | |
| return (((viewFlags & CLICKABLE) == CLICKABLE | |
| || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) | |
| || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE); | |
| } | |
| if (mTouchDelegate != null) { | |
| if (mTouchDelegate.onTouchEvent(event)) { | |
| return true; | |
| } | |
| } | |
| if (((viewFlags & CLICKABLE) == CLICKABLE || | |
| (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) || | |
| (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) { | |
| switch (action) { | |
| case MotionEvent.ACTION_UP: | |
| boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; | |
| if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { | |
| // take focus if we don't have it already and we should in | |
| // touch mode. | |
| boolean focusTaken = false; | |
| if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { | |
| focusTaken = requestFocus(); | |
| } | |
| if (prepressed) { | |
| // The button is being released before we actually | |
| // showed it as pressed. Make it show the pressed | |
| // state now (before scheduling the click) to ensure | |
| // the user sees it. | |
| setPressed(true, x, y); | |
| } | |
| if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) { | |
| // This is a tap, so remove the longpress check | |
| removeLongPressCallback(); | |
| // Only perform take click actions if we were in the pressed state | |
| if (!focusTaken) { | |
| // Use a Runnable and post this rather than calling | |
| // performClick directly. This lets other visual state | |
| // of the view update before click actions start. | |
| if (mPerformClick == null) { | |
| mPerformClick = new PerformClick(); | |
| } | |
| if (!post(mPerformClick)) { | |
| performClick(); | |
| } | |
| } | |
| } | |
| if (mUnsetPressedState == null) { | |
| mUnsetPressedState = new UnsetPressedState(); | |
| } | |
| if (prepressed) { | |
| postDelayed(mUnsetPressedState, | |
| ViewConfiguration.getPressedStateDuration()); | |
| } else if (!post(mUnsetPressedState)) { | |
| // If the post failed, unpress right now | |
| mUnsetPressedState.run(); | |
| } | |
| removeTapCallback(); | |
| } | |
| mIgnoreNextUpEvent = false; | |
| break; | |
| case MotionEvent.ACTION_DOWN: | |
| mHasPerformedLongPress = false; | |
| if (performButtonActionOnTouchDown(event)) { | |
| break; | |
| } | |
| // Walk up the hierarchy to determine if we're inside a scrolling container. | |
| boolean isInScrollingContainer = isInScrollingContainer(); | |
| // For views inside a scrolling container, delay the pressed feedback for | |
| // a short period in case this is a scroll. | |
| if (isInScrollingContainer) { | |
| mPrivateFlags |= PFLAG_PREPRESSED; | |
| if (mPendingCheckForTap == null) { | |
| mPendingCheckForTap = new CheckForTap(); | |
| } | |
| mPendingCheckForTap.x = event.getX(); | |
| mPendingCheckForTap.y = event.getY(); | |
| postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); | |
| } else { | |
| // Not inside a scrolling container, so show the feedback right away | |
| setPressed(true, x, y); | |
| checkForLongClick(0); | |
| } | |
| break; | |
| case MotionEvent.ACTION_CANCEL: | |
| setPressed(false); | |
| removeTapCallback(); | |
| removeLongPressCallback(); | |
| mInContextButtonPress = false; | |
| mHasPerformedLongPress = false; | |
| mIgnoreNextUpEvent = false; | |
| break; | |
| case MotionEvent.ACTION_MOVE: | |
| drawableHotspotChanged(x, y); | |
| // Be lenient about moving outside of buttons | |
| if (!pointInView(x, y, mTouchSlop)) { | |
| // Outside button | |
| removeTapCallback(); | |
| if ((mPrivateFlags & PFLAG_PRESSED) != 0) { | |
| // Remove any future long press/tap checks | |
| removeLongPressCallback(); | |
| setPressed(false); | |
| } | |
| } | |
| break; | |
| } | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public boolean isInScrollingContainer() { | |
| ViewParent p = getParent(); | |
| while (p != null && p instanceof ViewGroup) { | |
| if (((ViewGroup) p).shouldDelayChildPressedState()) { | |
| return true; | |
| } | |
| p = p.getParent(); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Remove the longpress detection timer. | |
| */ | |
| private void removeLongPressCallback() { | |
| if (mPendingCheckForLongPress != null) { | |
| removeCallbacks(mPendingCheckForLongPress); | |
| } | |
| } | |
| /** | |
| * Remove the pending click action | |
| */ | |
| private void removePerformClickCallback() { | |
| if (mPerformClick != null) { | |
| removeCallbacks(mPerformClick); | |
| } | |
| } | |
| /** | |
| * Remove the prepress detection timer. | |
| */ | |
| private void removeUnsetPressCallback() { | |
| if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { | |
| setPressed(false); | |
| removeCallbacks(mUnsetPressedState); | |
| } | |
| } | |
| /** | |
| * Remove the tap detection timer. | |
| */ | |
| private void removeTapCallback() { | |
| if (mPendingCheckForTap != null) { | |
| mPrivateFlags &= ~PFLAG_PREPRESSED; | |
| removeCallbacks(mPendingCheckForTap); | |
| } | |
| } | |
| /** | |
| * Cancels a pending long press. Your subclass can use this if you | |
| * want the context menu to come up if the user presses and holds | |
| * at the same place, but you don't want it to come up if they press | |
| * and then move around enough to cause scrolling. | |
| */ | |
| public void cancelLongPress() { | |
| removeLongPressCallback(); | |
| /* | |
| * The prepressed state handled by the tap callback is a display | |
| * construct, but the tap callback will post a long press callback | |
| * less its own timeout. Remove it here. | |
| */ | |
| removeTapCallback(); | |
| } | |
| /** | |
| * Remove the pending callback for sending a | |
| * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. | |
| */ | |
| private void removeSendViewScrolledAccessibilityEventCallback() { | |
| if (mSendViewScrolledAccessibilityEvent != null) { | |
| removeCallbacks(mSendViewScrolledAccessibilityEvent); | |
| mSendViewScrolledAccessibilityEvent.mIsPending = false; | |
| } | |
| } | |
| /** | |
| * Sets the TouchDelegate for this View. | |
| */ | |
| public void setTouchDelegate(TouchDelegate delegate) { | |
| mTouchDelegate = delegate; | |
| } | |
| /** | |
| * Gets the TouchDelegate for this View. | |
| */ | |
| public TouchDelegate getTouchDelegate() { | |
| return mTouchDelegate; | |
| } | |
| /** | |
| * Request unbuffered dispatch of the given stream of MotionEvents to this View. | |
| * | |
| * Until this View receives a corresponding {@link MotionEvent#ACTION_UP}, ask that the input | |
| * system not batch {@link MotionEvent}s but instead deliver them as soon as they're | |
| * available. This method should only be called for touch events. | |
| * | |
| * <p class="note">This api is not intended for most applications. Buffered dispatch | |
| * provides many of benefits, and just requesting unbuffered dispatch on most MotionEvent | |
| * streams will not improve your input latency. Side effects include: increased latency, | |
| * jittery scrolls and inability to take advantage of system resampling. Talk to your input | |
| * professional to see if {@link #requestUnbufferedDispatch(MotionEvent)} is right for | |
| * you.</p> | |
| */ | |
| public final void requestUnbufferedDispatch(MotionEvent event) { | |
| final int action = event.getAction(); | |
| if (mAttachInfo == null | |
| || action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_MOVE | |
| || !event.isTouchEvent()) { | |
| return; | |
| } | |
| mAttachInfo.mUnbufferedDispatchRequested = true; | |
| } | |
| /** | |
| * Set flags controlling behavior of this view. | |
| * | |
| * @param flags Constant indicating the value which should be set | |
| * @param mask Constant indicating the bit range that should be changed | |
| */ | |
| void setFlags(int flags, int mask) { | |
| final boolean accessibilityEnabled = | |
| AccessibilityManager.getInstance(mContext).isEnabled(); | |
| final boolean oldIncludeForAccessibility = accessibilityEnabled && includeForAccessibility(); | |
| int old = mViewFlags; | |
| mViewFlags = (mViewFlags & ~mask) | (flags & mask); | |
| int changed = mViewFlags ^ old; | |
| if (changed == 0) { | |
| return; | |
| } | |
| int privateFlags = mPrivateFlags; | |
| /* Check if the FOCUSABLE bit has changed */ | |
| if (((changed & FOCUSABLE_MASK) != 0) && | |
| ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { | |
| if (((old & FOCUSABLE_MASK) == FOCUSABLE) | |
| && ((privateFlags & PFLAG_FOCUSED) != 0)) { | |
| /* Give up focus if we are no longer focusable */ | |
| clearFocus(); | |
| } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) | |
| && ((privateFlags & PFLAG_FOCUSED) == 0)) { | |
| /* | |
| * Tell the view system that we are now available to take focus | |
| * if no one else already has it. | |
| */ | |
| if (mParent != null) mParent.focusableViewAvailable(this); | |
| } | |
| } | |
| final int newVisibility = flags & VISIBILITY_MASK; | |
| if (newVisibility == VISIBLE) { | |
| if ((changed & VISIBILITY_MASK) != 0) { | |
| /* | |
| * If this view is becoming visible, invalidate it in case it changed while | |
| * it was not visible. Marking it drawn ensures that the invalidation will | |
| * go through. | |
| */ | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| invalidate(true); | |
| needGlobalAttributesUpdate(true); | |
| // a view becoming visible is worth notifying the parent | |
| // about in case nothing has focus. even if this specific view | |
| // isn't focusable, it may contain something that is, so let | |
| // the root view try to give this focus if nothing else does. | |
| if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { | |
| mParent.focusableViewAvailable(this); | |
| } | |
| } | |
| } | |
| /* Check if the GONE bit has changed */ | |
| if ((changed & GONE) != 0) { | |
| needGlobalAttributesUpdate(false); | |
| requestLayout(); | |
| if (((mViewFlags & VISIBILITY_MASK) == GONE)) { | |
| if (hasFocus()) clearFocus(); | |
| clearAccessibilityFocus(); | |
| destroyDrawingCache(); | |
| if (mParent instanceof View) { | |
| // GONE views noop invalidation, so invalidate the parent | |
| ((View) mParent).invalidate(true); | |
| } | |
| // Mark the view drawn to ensure that it gets invalidated properly the next | |
| // time it is visible and gets invalidated | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| } | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mViewVisibilityChanged = true; | |
| } | |
| } | |
| /* Check if the VISIBLE bit has changed */ | |
| if ((changed & INVISIBLE) != 0) { | |
| needGlobalAttributesUpdate(false); | |
| /* | |
| * If this view is becoming invisible, set the DRAWN flag so that | |
| * the next invalidate() will not be skipped. | |
| */ | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE)) { | |
| // root view becoming invisible shouldn't clear focus and accessibility focus | |
| if (getRootView() != this) { | |
| if (hasFocus()) clearFocus(); | |
| clearAccessibilityFocus(); | |
| } | |
| } | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mViewVisibilityChanged = true; | |
| } | |
| } | |
| if ((changed & VISIBILITY_MASK) != 0) { | |
| // If the view is invisible, cleanup its display list to free up resources | |
| if (newVisibility != VISIBLE && mAttachInfo != null) { | |
| cleanupDraw(); | |
| } | |
| if (mParent instanceof ViewGroup) { | |
| ((ViewGroup) mParent).onChildVisibilityChanged(this, | |
| (changed & VISIBILITY_MASK), newVisibility); | |
| ((View) mParent).invalidate(true); | |
| } else if (mParent != null) { | |
| mParent.invalidateChild(this, null); | |
| } | |
| if (mAttachInfo != null) { | |
| dispatchVisibilityChanged(this, newVisibility); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { | |
| destroyDrawingCache(); | |
| } | |
| if ((changed & DRAWING_CACHE_ENABLED) != 0) { | |
| destroyDrawingCache(); | |
| mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; | |
| invalidateParentCaches(); | |
| } | |
| if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { | |
| destroyDrawingCache(); | |
| mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; | |
| } | |
| if ((changed & DRAW_MASK) != 0) { | |
| if ((mViewFlags & WILL_NOT_DRAW) != 0) { | |
| if (mBackground != null | |
| || (mForegroundInfo != null && mForegroundInfo.mDrawable != null)) { | |
| mPrivateFlags &= ~PFLAG_SKIP_DRAW; | |
| } else { | |
| mPrivateFlags |= PFLAG_SKIP_DRAW; | |
| } | |
| } else { | |
| mPrivateFlags &= ~PFLAG_SKIP_DRAW; | |
| } | |
| requestLayout(); | |
| invalidate(true); | |
| } | |
| if ((changed & KEEP_SCREEN_ON) != 0) { | |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { | |
| mParent.recomputeViewAttributes(this); | |
| } | |
| } | |
| if (accessibilityEnabled) { | |
| if ((changed & FOCUSABLE_MASK) != 0 || (changed & VISIBILITY_MASK) != 0 | |
| || (changed & CLICKABLE) != 0 || (changed & LONG_CLICKABLE) != 0 | |
| || (changed & CONTEXT_CLICKABLE) != 0) { | |
| if (oldIncludeForAccessibility != includeForAccessibility()) { | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } else { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } else if ((changed & ENABLED_MASK) != 0) { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } | |
| } | |
| /** | |
| * Change the view's z order in the tree, so it's on top of other sibling | |
| * views. This ordering change may affect layout, if the parent container | |
| * uses an order-dependent layout scheme (e.g., LinearLayout). Prior | |
| * to {@link android.os.Build.VERSION_CODES#KITKAT} this | |
| * method should be followed by calls to {@link #requestLayout()} and | |
| * {@link View#invalidate()} on the view's parent to force the parent to redraw | |
| * with the new child ordering. | |
| * | |
| * @see ViewGroup#bringChildToFront(View) | |
| */ | |
| public void bringToFront() { | |
| if (mParent != null) { | |
| mParent.bringChildToFront(this); | |
| } | |
| } | |
| /** | |
| * This is called in response to an internal scroll in this view (i.e., the | |
| * view scrolled its own contents). This is typically as a result of | |
| * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been | |
| * called. | |
| * | |
| * @param l Current horizontal scroll origin. | |
| * @param t Current vertical scroll origin. | |
| * @param oldl Previous horizontal scroll origin. | |
| * @param oldt Previous vertical scroll origin. | |
| */ | |
| protected void onScrollChanged(int l, int t, int oldl, int oldt) { | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| if (AccessibilityManager.getInstance(mContext).isEnabled()) { | |
| postSendViewScrolledAccessibilityEventCallback(); | |
| } | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| final AttachInfo ai = mAttachInfo; | |
| if (ai != null) { | |
| ai.mViewScrollChanged = true; | |
| } | |
| if (mListenerInfo != null && mListenerInfo.mOnScrollChangeListener != null) { | |
| mListenerInfo.mOnScrollChangeListener.onScrollChange(this, l, t, oldl, oldt); | |
| } | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when the scroll | |
| * X or Y positions of a view change. | |
| * <p> | |
| * <b>Note:</b> Some views handle scrolling independently from View and may | |
| * have their own separate listeners for scroll-type events. For example, | |
| * {@link android.widget.ListView ListView} allows clients to register an | |
| * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} | |
| * to listen for changes in list scroll position. | |
| * | |
| * @see #setOnScrollChangeListener(View.OnScrollChangeListener) | |
| */ | |
| public interface OnScrollChangeListener { | |
| /** | |
| * Called when the scroll position of a view changes. | |
| * | |
| * @param v The view whose scroll position has changed. | |
| * @param scrollX Current horizontal scroll origin. | |
| * @param scrollY Current vertical scroll origin. | |
| * @param oldScrollX Previous horizontal scroll origin. | |
| * @param oldScrollY Previous vertical scroll origin. | |
| */ | |
| void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when the layout bounds of a view | |
| * changes due to layout processing. | |
| */ | |
| public interface OnLayoutChangeListener { | |
| /** | |
| * Called when the layout bounds of a view changes due to layout processing. | |
| * | |
| * @param v The view whose bounds have changed. | |
| * @param left The new value of the view's left property. | |
| * @param top The new value of the view's top property. | |
| * @param right The new value of the view's right property. | |
| * @param bottom The new value of the view's bottom property. | |
| * @param oldLeft The previous value of the view's left property. | |
| * @param oldTop The previous value of the view's top property. | |
| * @param oldRight The previous value of the view's right property. | |
| * @param oldBottom The previous value of the view's bottom property. | |
| */ | |
| void onLayoutChange(View v, int left, int top, int right, int bottom, | |
| int oldLeft, int oldTop, int oldRight, int oldBottom); | |
| } | |
| /** | |
| * This is called during layout when the size of this view has changed. If | |
| * you were just added to the view hierarchy, you're called with the old | |
| * values of 0. | |
| * | |
| * @param w Current width of this view. | |
| * @param h Current height of this view. | |
| * @param oldw Old width of this view. | |
| * @param oldh Old height of this view. | |
| */ | |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { | |
| } | |
| /** | |
| * Called by draw to draw the child views. This may be overridden | |
| * by derived classes to gain control just before its children are drawn | |
| * (but after its own view has been drawn). | |
| * @param canvas the canvas on which to draw the view | |
| */ | |
| protected void dispatchDraw(Canvas canvas) { | |
| } | |
| /** | |
| * Gets the parent of this view. Note that the parent is a | |
| * ViewParent and not necessarily a View. | |
| * | |
| * @return Parent of this view. | |
| */ | |
| public final ViewParent getParent() { | |
| return mParent; | |
| } | |
| /** | |
| * Set the horizontal scrolled position of your view. This will cause a call to | |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be | |
| * invalidated. | |
| * @param value the x position to scroll to | |
| */ | |
| public void setScrollX(int value) { | |
| scrollTo(value, mScrollY); | |
| } | |
| /** | |
| * Set the vertical scrolled position of your view. This will cause a call to | |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be | |
| * invalidated. | |
| * @param value the y position to scroll to | |
| */ | |
| public void setScrollY(int value) { | |
| scrollTo(mScrollX, value); | |
| } | |
| /** | |
| * Return the scrolled left position of this view. This is the left edge of | |
| * the displayed part of your view. You do not need to draw any pixels | |
| * farther left, since those are outside of the frame of your view on | |
| * screen. | |
| * | |
| * @return The left edge of the displayed part of your view, in pixels. | |
| */ | |
| public final int getScrollX() { | |
| return mScrollX; | |
| } | |
| /** | |
| * Return the scrolled top position of this view. This is the top edge of | |
| * the displayed part of your view. You do not need to draw any pixels above | |
| * it, since those are outside of the frame of your view on screen. | |
| * | |
| * @return The top edge of the displayed part of your view, in pixels. | |
| */ | |
| public final int getScrollY() { | |
| return mScrollY; | |
| } | |
| /** | |
| * Return the width of the your view. | |
| * | |
| * @return The width of your view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| public final int getWidth() { | |
| return mRight - mLeft; | |
| } | |
| /** | |
| * Return the height of your view. | |
| * | |
| * @return The height of your view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| public final int getHeight() { | |
| return mBottom - mTop; | |
| } | |
| /** | |
| * Return the visible drawing bounds of your view. Fills in the output | |
| * rectangle with the values from getScrollX(), getScrollY(), | |
| * getWidth(), and getHeight(). These bounds do not account for any | |
| * transformation properties currently set on the view, such as | |
| * {@link #setScaleX(float)} or {@link #setRotation(float)}. | |
| * | |
| * @param outRect The (scrolled) drawing bounds of the view. | |
| */ | |
| public void getDrawingRect(Rect outRect) { | |
| outRect.left = mScrollX; | |
| outRect.top = mScrollY; | |
| outRect.right = mScrollX + (mRight - mLeft); | |
| outRect.bottom = mScrollY + (mBottom - mTop); | |
| } | |
| /** | |
| * Like {@link #getMeasuredWidthAndState()}, but only returns the | |
| * raw width component (that is the result is masked by | |
| * {@link #MEASURED_SIZE_MASK}). | |
| * | |
| * @return The raw measured width of this view. | |
| */ | |
| public final int getMeasuredWidth() { | |
| return mMeasuredWidth & MEASURED_SIZE_MASK; | |
| } | |
| /** | |
| * Return the full width measurement information for this view as computed | |
| * by the most recent call to {@link #measure(int, int)}. This result is a bit mask | |
| * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. | |
| * This should be used during measurement and layout calculations only. Use | |
| * {@link #getWidth()} to see how wide a view is after layout. | |
| * | |
| * @return The measured width of this view as a bit mask. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { | |
| @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, | |
| name = "MEASURED_STATE_TOO_SMALL"), | |
| }) | |
| public final int getMeasuredWidthAndState() { | |
| return mMeasuredWidth; | |
| } | |
| /** | |
| * Like {@link #getMeasuredHeightAndState()}, but only returns the | |
| * raw width component (that is the result is masked by | |
| * {@link #MEASURED_SIZE_MASK}). | |
| * | |
| * @return The raw measured height of this view. | |
| */ | |
| public final int getMeasuredHeight() { | |
| return mMeasuredHeight & MEASURED_SIZE_MASK; | |
| } | |
| /** | |
| * Return the full height measurement information for this view as computed | |
| * by the most recent call to {@link #measure(int, int)}. This result is a bit mask | |
| * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. | |
| * This should be used during measurement and layout calculations only. Use | |
| * {@link #getHeight()} to see how wide a view is after layout. | |
| * | |
| * @return The measured width of this view as a bit mask. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { | |
| @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, | |
| name = "MEASURED_STATE_TOO_SMALL"), | |
| }) | |
| public final int getMeasuredHeightAndState() { | |
| return mMeasuredHeight; | |
| } | |
| /** | |
| * Return only the state bits of {@link #getMeasuredWidthAndState()} | |
| * and {@link #getMeasuredHeightAndState()}, combined into one integer. | |
| * The width component is in the regular bits {@link #MEASURED_STATE_MASK} | |
| * and the height component is at the shifted bits | |
| * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. | |
| */ | |
| public final int getMeasuredState() { | |
| return (mMeasuredWidth&MEASURED_STATE_MASK) | |
| | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) | |
| & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); | |
| } | |
| /** | |
| * The transform matrix of this view, which is calculated based on the current | |
| * rotation, scale, and pivot properties. | |
| * | |
| * @see #getRotation() | |
| * @see #getScaleX() | |
| * @see #getScaleY() | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @return The current transform matrix for the view | |
| */ | |
| public Matrix getMatrix() { | |
| ensureTransformationInfo(); | |
| final Matrix matrix = mTransformationInfo.mMatrix; | |
| mRenderNode.getMatrix(matrix); | |
| return matrix; | |
| } | |
| /** | |
| * Returns true if the transform matrix is the identity matrix. | |
| * Recomputes the matrix if necessary. | |
| * | |
| * @return True if the transform matrix is the identity matrix, false otherwise. | |
| */ | |
| final boolean hasIdentityMatrix() { | |
| return mRenderNode.hasIdentityMatrix(); | |
| } | |
| void ensureTransformationInfo() { | |
| if (mTransformationInfo == null) { | |
| mTransformationInfo = new TransformationInfo(); | |
| } | |
| } | |
| /** | |
| * Utility method to retrieve the inverse of the current mMatrix property. | |
| * We cache the matrix to avoid recalculating it when transform properties | |
| * have not changed. | |
| * | |
| * @return The inverse of the current matrix of this view. | |
| * @hide | |
| */ | |
| public final Matrix getInverseMatrix() { | |
| ensureTransformationInfo(); | |
| if (mTransformationInfo.mInverseMatrix == null) { | |
| mTransformationInfo.mInverseMatrix = new Matrix(); | |
| } | |
| final Matrix matrix = mTransformationInfo.mInverseMatrix; | |
| mRenderNode.getInverseMatrix(matrix); | |
| return matrix; | |
| } | |
| /** | |
| * Gets the distance along the Z axis from the camera to this view. | |
| * | |
| * @see #setCameraDistance(float) | |
| * | |
| * @return The distance along the Z axis. | |
| */ | |
| public float getCameraDistance() { | |
| final float dpi = mResources.getDisplayMetrics().densityDpi; | |
| return -(mRenderNode.getCameraDistance() * dpi); | |
| } | |
| /** | |
| * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which | |
| * views are drawn) from the camera to this view. The camera's distance | |
| * affects 3D transformations, for instance rotations around the X and Y | |
| * axis. If the rotationX or rotationY properties are changed and this view is | |
| * large (more than half the size of the screen), it is recommended to always | |
| * use a camera distance that's greater than the height (X axis rotation) or | |
| * the width (Y axis rotation) of this view.</p> | |
| * | |
| * <p>The distance of the camera from the view plane can have an affect on the | |
| * perspective distortion of the view when it is rotated around the x or y axis. | |
| * For example, a large distance will result in a large viewing angle, and there | |
| * will not be much perspective distortion of the view as it rotates. A short | |
| * distance may cause much more perspective distortion upon rotation, and can | |
| * also result in some drawing artifacts if the rotated view ends up partially | |
| * behind the camera (which is why the recommendation is to use a distance at | |
| * least as far as the size of the view, if the view is to be rotated.)</p> | |
| * | |
| * <p>The distance is expressed in "depth pixels." The default distance depends | |
| * on the screen density. For instance, on a medium density display, the | |
| * default distance is 1280. On a high density display, the default distance | |
| * is 1920.</p> | |
| * | |
| * <p>If you want to specify a distance that leads to visually consistent | |
| * results across various densities, use the following formula:</p> | |
| * <pre> | |
| * float scale = context.getResources().getDisplayMetrics().density; | |
| * view.setCameraDistance(distance * scale); | |
| * </pre> | |
| * | |
| * <p>The density scale factor of a high density display is 1.5, | |
| * and 1920 = 1280 * 1.5.</p> | |
| * | |
| * @param distance The distance in "depth pixels", if negative the opposite | |
| * value is used | |
| * | |
| * @see #setRotationX(float) | |
| * @see #setRotationY(float) | |
| */ | |
| public void setCameraDistance(float distance) { | |
| final float dpi = mResources.getDisplayMetrics().densityDpi; | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setCameraDistance(-Math.abs(distance) / dpi); | |
| invalidateViewProperty(false, false); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| /** | |
| * The degrees that the view is rotated around the pivot point. | |
| * | |
| * @see #setRotation(float) | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * | |
| * @return The degrees of rotation. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getRotation() { | |
| return mRenderNode.getRotation(); | |
| } | |
| /** | |
| * Sets the degrees that the view is rotated around the pivot point. Increasing values | |
| * result in clockwise rotation. | |
| * | |
| * @param rotation The degrees of rotation. | |
| * | |
| * @see #getRotation() | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @see #setRotationX(float) | |
| * @see #setRotationY(float) | |
| * | |
| * @attr ref android.R.styleable#View_rotation | |
| */ | |
| public void setRotation(float rotation) { | |
| if (rotation != getRotation()) { | |
| // Double-invalidation is necessary to capture view's old and new areas | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setRotation(rotation); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The degrees that the view is rotated around the vertical axis through the pivot point. | |
| * | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @see #setRotationY(float) | |
| * | |
| * @return The degrees of Y rotation. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getRotationY() { | |
| return mRenderNode.getRotationY(); | |
| } | |
| /** | |
| * Sets the degrees that the view is rotated around the vertical axis through the pivot point. | |
| * Increasing values result in counter-clockwise rotation from the viewpoint of looking | |
| * down the y axis. | |
| * | |
| * When rotating large views, it is recommended to adjust the camera distance | |
| * accordingly. Refer to {@link #setCameraDistance(float)} for more information. | |
| * | |
| * @param rotationY The degrees of Y rotation. | |
| * | |
| * @see #getRotationY() | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @see #setRotation(float) | |
| * @see #setRotationX(float) | |
| * @see #setCameraDistance(float) | |
| * | |
| * @attr ref android.R.styleable#View_rotationY | |
| */ | |
| public void setRotationY(float rotationY) { | |
| if (rotationY != getRotationY()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setRotationY(rotationY); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The degrees that the view is rotated around the horizontal axis through the pivot point. | |
| * | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @see #setRotationX(float) | |
| * | |
| * @return The degrees of X rotation. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getRotationX() { | |
| return mRenderNode.getRotationX(); | |
| } | |
| /** | |
| * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. | |
| * Increasing values result in clockwise rotation from the viewpoint of looking down the | |
| * x axis. | |
| * | |
| * When rotating large views, it is recommended to adjust the camera distance | |
| * accordingly. Refer to {@link #setCameraDistance(float)} for more information. | |
| * | |
| * @param rotationX The degrees of X rotation. | |
| * | |
| * @see #getRotationX() | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @see #setRotation(float) | |
| * @see #setRotationY(float) | |
| * @see #setCameraDistance(float) | |
| * | |
| * @attr ref android.R.styleable#View_rotationX | |
| */ | |
| public void setRotationX(float rotationX) { | |
| if (rotationX != getRotationX()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setRotationX(rotationX); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The amount that the view is scaled in x around the pivot point, as a proportion of | |
| * the view's unscaled width. A value of 1, the default, means that no scaling is applied. | |
| * | |
| * <p>By default, this is 1.0f. | |
| * | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @return The scaling factor. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getScaleX() { | |
| return mRenderNode.getScaleX(); | |
| } | |
| /** | |
| * Sets the amount that the view is scaled in x around the pivot point, as a proportion of | |
| * the view's unscaled width. A value of 1 means that no scaling is applied. | |
| * | |
| * @param scaleX The scaling factor. | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * | |
| * @attr ref android.R.styleable#View_scaleX | |
| */ | |
| public void setScaleX(float scaleX) { | |
| if (scaleX != getScaleX()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setScaleX(scaleX); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The amount that the view is scaled in y around the pivot point, as a proportion of | |
| * the view's unscaled height. A value of 1, the default, means that no scaling is applied. | |
| * | |
| * <p>By default, this is 1.0f. | |
| * | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * @return The scaling factor. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getScaleY() { | |
| return mRenderNode.getScaleY(); | |
| } | |
| /** | |
| * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of | |
| * the view's unscaled width. A value of 1 means that no scaling is applied. | |
| * | |
| * @param scaleY The scaling factor. | |
| * @see #getPivotX() | |
| * @see #getPivotY() | |
| * | |
| * @attr ref android.R.styleable#View_scaleY | |
| */ | |
| public void setScaleY(float scaleY) { | |
| if (scaleY != getScaleY()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setScaleY(scaleY); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The x location of the point around which the view is {@link #setRotation(float) rotated} | |
| * and {@link #setScaleX(float) scaled}. | |
| * | |
| * @see #getRotation() | |
| * @see #getScaleX() | |
| * @see #getScaleY() | |
| * @see #getPivotY() | |
| * @return The x location of the pivot point. | |
| * | |
| * @attr ref android.R.styleable#View_transformPivotX | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getPivotX() { | |
| return mRenderNode.getPivotX(); | |
| } | |
| /** | |
| * Sets the x location of the point around which the view is | |
| * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. | |
| * By default, the pivot point is centered on the object. | |
| * Setting this property disables this behavior and causes the view to use only the | |
| * explicitly set pivotX and pivotY values. | |
| * | |
| * @param pivotX The x location of the pivot point. | |
| * @see #getRotation() | |
| * @see #getScaleX() | |
| * @see #getScaleY() | |
| * @see #getPivotY() | |
| * | |
| * @attr ref android.R.styleable#View_transformPivotX | |
| */ | |
| public void setPivotX(float pivotX) { | |
| if (!mRenderNode.isPivotExplicitlySet() || pivotX != getPivotX()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setPivotX(pivotX); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| } | |
| /** | |
| * The y location of the point around which the view is {@link #setRotation(float) rotated} | |
| * and {@link #setScaleY(float) scaled}. | |
| * | |
| * @see #getRotation() | |
| * @see #getScaleX() | |
| * @see #getScaleY() | |
| * @see #getPivotY() | |
| * @return The y location of the pivot point. | |
| * | |
| * @attr ref android.R.styleable#View_transformPivotY | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getPivotY() { | |
| return mRenderNode.getPivotY(); | |
| } | |
| /** | |
| * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} | |
| * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. | |
| * Setting this property disables this behavior and causes the view to use only the | |
| * explicitly set pivotX and pivotY values. | |
| * | |
| * @param pivotY The y location of the pivot point. | |
| * @see #getRotation() | |
| * @see #getScaleX() | |
| * @see #getScaleY() | |
| * @see #getPivotY() | |
| * | |
| * @attr ref android.R.styleable#View_transformPivotY | |
| */ | |
| public void setPivotY(float pivotY) { | |
| if (!mRenderNode.isPivotExplicitlySet() || pivotY != getPivotY()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setPivotY(pivotY); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| } | |
| /** | |
| * The opacity of the view. This is a value from 0 to 1, where 0 means the view is | |
| * completely transparent and 1 means the view is completely opaque. | |
| * | |
| * <p>By default this is 1.0f. | |
| * @return The opacity of the view. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getAlpha() { | |
| return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; | |
| } | |
| /** | |
| * Returns whether this View has content which overlaps. | |
| * | |
| * <p>This function, intended to be overridden by specific View types, is an optimization when | |
| * alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to | |
| * an offscreen buffer and then composited into place, which can be expensive. If the view has | |
| * no overlapping rendering, the view can draw each primitive with the appropriate alpha value | |
| * directly. An example of overlapping rendering is a TextView with a background image, such as | |
| * a Button. An example of non-overlapping rendering is a TextView with no background, or an | |
| * ImageView with only the foreground image. The default implementation returns true; subclasses | |
| * should override if they have cases which can be optimized.</p> | |
| * | |
| * <p>The current implementation of the saveLayer and saveLayerAlpha methods in {@link Canvas} | |
| * necessitates that a View return true if it uses the methods internally without passing the | |
| * {@link Canvas#CLIP_TO_LAYER_SAVE_FLAG}.</p> | |
| * | |
| * @return true if the content in this view might overlap, false otherwise. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean hasOverlappingRendering() { | |
| return true; | |
| } | |
| /** | |
| * Sets the opacity of the view to a value from 0 to 1, where 0 means the view is | |
| * completely transparent and 1 means the view is completely opaque. | |
| * | |
| * <p class="note"><strong>Note:</strong> setting alpha to a translucent value (0 < alpha < 1) | |
| * can have significant performance implications, especially for large views. It is best to use | |
| * the alpha property sparingly and transiently, as in the case of fading animations.</p> | |
| * | |
| * <p>For a view with a frequently changing alpha, such as during a fading animation, it is | |
| * strongly recommended for performance reasons to either override | |
| * {@link #hasOverlappingRendering()} to return <code>false</code> if appropriate, or setting a | |
| * {@link #setLayerType(int, android.graphics.Paint) layer type} on the view for the duration | |
| * of the animation. On versions {@link android.os.Build.VERSION_CODES#M} and below, | |
| * the default path for rendering an unlayered View with alpha could add multiple milliseconds | |
| * of rendering cost, even for simple or small views. Starting with | |
| * {@link android.os.Build.VERSION_CODES#M}, {@link #LAYER_TYPE_HARDWARE} is automatically | |
| * applied to the view at the rendering level.</p> | |
| * | |
| * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is | |
| * responsible for applying the opacity itself.</p> | |
| * | |
| * <p>On versions {@link android.os.Build.VERSION_CODES#LOLLIPOP_MR1} and below, note that if | |
| * the view is backed by a {@link #setLayerType(int, android.graphics.Paint) layer} and is | |
| * associated with a {@link #setLayerPaint(android.graphics.Paint) layer paint}, setting an | |
| * alpha value less than 1.0 will supersede the alpha of the layer paint.</p> | |
| * | |
| * <p>Starting with {@link android.os.Build.VERSION_CODES#M}, setting a translucent alpha | |
| * value will clip a View to its bounds, unless the View returns <code>false</code> from | |
| * {@link #hasOverlappingRendering}.</p> | |
| * | |
| * @param alpha The opacity of the view. | |
| * | |
| * @see #hasOverlappingRendering() | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| * | |
| * @attr ref android.R.styleable#View_alpha | |
| */ | |
| public void setAlpha(@FloatRange(from=0.0, to=1.0) float alpha) { | |
| ensureTransformationInfo(); | |
| if (mTransformationInfo.mAlpha != alpha) { | |
| mTransformationInfo.mAlpha = alpha; | |
| if (onSetAlpha((int) (alpha * 255))) { | |
| mPrivateFlags |= PFLAG_ALPHA_SET; | |
| // subclass is handling alpha - don't optimize rendering cache invalidation | |
| invalidateParentCaches(); | |
| invalidate(true); | |
| } else { | |
| mPrivateFlags &= ~PFLAG_ALPHA_SET; | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setAlpha(getFinalAlpha()); | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } | |
| } | |
| /** | |
| * Faster version of setAlpha() which performs the same steps except there are | |
| * no calls to invalidate(). The caller of this function should perform proper invalidation | |
| * on the parent and this object. The return value indicates whether the subclass handles | |
| * alpha (the return value for onSetAlpha()). | |
| * | |
| * @param alpha The new value for the alpha property | |
| * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and | |
| * the new value for the alpha property is different from the old value | |
| */ | |
| boolean setAlphaNoInvalidation(float alpha) { | |
| ensureTransformationInfo(); | |
| if (mTransformationInfo.mAlpha != alpha) { | |
| mTransformationInfo.mAlpha = alpha; | |
| boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); | |
| if (subclassHandlesAlpha) { | |
| mPrivateFlags |= PFLAG_ALPHA_SET; | |
| return true; | |
| } else { | |
| mPrivateFlags &= ~PFLAG_ALPHA_SET; | |
| mRenderNode.setAlpha(getFinalAlpha()); | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * This property is hidden and intended only for use by the Fade transition, which | |
| * animates it to produce a visual translucency that does not side-effect (or get | |
| * affected by) the real alpha property. This value is composited with the other | |
| * alpha value (and the AlphaAnimation value, when that is present) to produce | |
| * a final visual translucency result, which is what is passed into the DisplayList. | |
| * | |
| * @hide | |
| */ | |
| public void setTransitionAlpha(float alpha) { | |
| ensureTransformationInfo(); | |
| if (mTransformationInfo.mTransitionAlpha != alpha) { | |
| mTransformationInfo.mTransitionAlpha = alpha; | |
| mPrivateFlags &= ~PFLAG_ALPHA_SET; | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setAlpha(getFinalAlpha()); | |
| } | |
| } | |
| /** | |
| * Calculates the visual alpha of this view, which is a combination of the actual | |
| * alpha value and the transitionAlpha value (if set). | |
| */ | |
| private float getFinalAlpha() { | |
| if (mTransformationInfo != null) { | |
| return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha; | |
| } | |
| return 1; | |
| } | |
| /** | |
| * This property is hidden and intended only for use by the Fade transition, which | |
| * animates it to produce a visual translucency that does not side-effect (or get | |
| * affected by) the real alpha property. This value is composited with the other | |
| * alpha value (and the AlphaAnimation value, when that is present) to produce | |
| * a final visual translucency result, which is what is passed into the DisplayList. | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getTransitionAlpha() { | |
| return mTransformationInfo != null ? mTransformationInfo.mTransitionAlpha : 1; | |
| } | |
| /** | |
| * Top position of this view relative to its parent. | |
| * | |
| * @return The top of this view, in pixels. | |
| */ | |
| @ViewDebug.CapturedViewProperty | |
| public final int getTop() { | |
| return mTop; | |
| } | |
| /** | |
| * Sets the top position of this view relative to its parent. This method is meant to be called | |
| * by the layout system and should not generally be called otherwise, because the property | |
| * may be changed at any time by the layout. | |
| * | |
| * @param top The top of this view, in pixels. | |
| */ | |
| public final void setTop(int top) { | |
| if (top != mTop) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (mAttachInfo != null) { | |
| int minTop; | |
| int yLoc; | |
| if (top < mTop) { | |
| minTop = top; | |
| yLoc = top - mTop; | |
| } else { | |
| minTop = mTop; | |
| yLoc = 0; | |
| } | |
| invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); | |
| } | |
| } else { | |
| // Double-invalidation is necessary to capture view's old and new areas | |
| invalidate(true); | |
| } | |
| int width = mRight - mLeft; | |
| int oldHeight = mBottom - mTop; | |
| mTop = top; | |
| mRenderNode.setTop(mTop); | |
| sizeChange(width, mBottom - mTop, width, oldHeight); | |
| if (!matrixIsIdentity) { | |
| mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation | |
| invalidate(true); | |
| } | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| invalidateParentIfNeeded(); | |
| if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { | |
| // View was rejected last time it was drawn by its parent; this may have changed | |
| invalidateParentIfNeeded(); | |
| } | |
| } | |
| } | |
| /** | |
| * Bottom position of this view relative to its parent. | |
| * | |
| * @return The bottom of this view, in pixels. | |
| */ | |
| @ViewDebug.CapturedViewProperty | |
| public final int getBottom() { | |
| return mBottom; | |
| } | |
| /** | |
| * True if this view has changed since the last time being drawn. | |
| * | |
| * @return The dirty state of this view. | |
| */ | |
| public boolean isDirty() { | |
| return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; | |
| } | |
| /** | |
| * Sets the bottom position of this view relative to its parent. This method is meant to be | |
| * called by the layout system and should not generally be called otherwise, because the | |
| * property may be changed at any time by the layout. | |
| * | |
| * @param bottom The bottom of this view, in pixels. | |
| */ | |
| public final void setBottom(int bottom) { | |
| if (bottom != mBottom) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (mAttachInfo != null) { | |
| int maxBottom; | |
| if (bottom < mBottom) { | |
| maxBottom = mBottom; | |
| } else { | |
| maxBottom = bottom; | |
| } | |
| invalidate(0, 0, mRight - mLeft, maxBottom - mTop); | |
| } | |
| } else { | |
| // Double-invalidation is necessary to capture view's old and new areas | |
| invalidate(true); | |
| } | |
| int width = mRight - mLeft; | |
| int oldHeight = mBottom - mTop; | |
| mBottom = bottom; | |
| mRenderNode.setBottom(mBottom); | |
| sizeChange(width, mBottom - mTop, width, oldHeight); | |
| if (!matrixIsIdentity) { | |
| mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation | |
| invalidate(true); | |
| } | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| invalidateParentIfNeeded(); | |
| if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { | |
| // View was rejected last time it was drawn by its parent; this may have changed | |
| invalidateParentIfNeeded(); | |
| } | |
| } | |
| } | |
| /** | |
| * Left position of this view relative to its parent. | |
| * | |
| * @return The left edge of this view, in pixels. | |
| */ | |
| @ViewDebug.CapturedViewProperty | |
| public final int getLeft() { | |
| return mLeft; | |
| } | |
| /** | |
| * Sets the left position of this view relative to its parent. This method is meant to be called | |
| * by the layout system and should not generally be called otherwise, because the property | |
| * may be changed at any time by the layout. | |
| * | |
| * @param left The left of this view, in pixels. | |
| */ | |
| public final void setLeft(int left) { | |
| if (left != mLeft) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (mAttachInfo != null) { | |
| int minLeft; | |
| int xLoc; | |
| if (left < mLeft) { | |
| minLeft = left; | |
| xLoc = left - mLeft; | |
| } else { | |
| minLeft = mLeft; | |
| xLoc = 0; | |
| } | |
| invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); | |
| } | |
| } else { | |
| // Double-invalidation is necessary to capture view's old and new areas | |
| invalidate(true); | |
| } | |
| int oldWidth = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| mLeft = left; | |
| mRenderNode.setLeft(left); | |
| sizeChange(mRight - mLeft, height, oldWidth, height); | |
| if (!matrixIsIdentity) { | |
| mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation | |
| invalidate(true); | |
| } | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| invalidateParentIfNeeded(); | |
| if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { | |
| // View was rejected last time it was drawn by its parent; this may have changed | |
| invalidateParentIfNeeded(); | |
| } | |
| } | |
| } | |
| /** | |
| * Right position of this view relative to its parent. | |
| * | |
| * @return The right edge of this view, in pixels. | |
| */ | |
| @ViewDebug.CapturedViewProperty | |
| public final int getRight() { | |
| return mRight; | |
| } | |
| /** | |
| * Sets the right position of this view relative to its parent. This method is meant to be called | |
| * by the layout system and should not generally be called otherwise, because the property | |
| * may be changed at any time by the layout. | |
| * | |
| * @param right The right of this view, in pixels. | |
| */ | |
| public final void setRight(int right) { | |
| if (right != mRight) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (mAttachInfo != null) { | |
| int maxRight; | |
| if (right < mRight) { | |
| maxRight = mRight; | |
| } else { | |
| maxRight = right; | |
| } | |
| invalidate(0, 0, maxRight - mLeft, mBottom - mTop); | |
| } | |
| } else { | |
| // Double-invalidation is necessary to capture view's old and new areas | |
| invalidate(true); | |
| } | |
| int oldWidth = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| mRight = right; | |
| mRenderNode.setRight(mRight); | |
| sizeChange(mRight - mLeft, height, oldWidth, height); | |
| if (!matrixIsIdentity) { | |
| mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation | |
| invalidate(true); | |
| } | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| invalidateParentIfNeeded(); | |
| if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { | |
| // View was rejected last time it was drawn by its parent; this may have changed | |
| invalidateParentIfNeeded(); | |
| } | |
| } | |
| } | |
| /** | |
| * The visual x position of this view, in pixels. This is equivalent to the | |
| * {@link #setTranslationX(float) translationX} property plus the current | |
| * {@link #getLeft() left} property. | |
| * | |
| * @return The visual x position of this view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getX() { | |
| return mLeft + getTranslationX(); | |
| } | |
| /** | |
| * Sets the visual x position of this view, in pixels. This is equivalent to setting the | |
| * {@link #setTranslationX(float) translationX} property to be the difference between | |
| * the x value passed in and the current {@link #getLeft() left} property. | |
| * | |
| * @param x The visual x position of this view, in pixels. | |
| */ | |
| public void setX(float x) { | |
| setTranslationX(x - mLeft); | |
| } | |
| /** | |
| * The visual y position of this view, in pixels. This is equivalent to the | |
| * {@link #setTranslationY(float) translationY} property plus the current | |
| * {@link #getTop() top} property. | |
| * | |
| * @return The visual y position of this view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getY() { | |
| return mTop + getTranslationY(); | |
| } | |
| /** | |
| * Sets the visual y position of this view, in pixels. This is equivalent to setting the | |
| * {@link #setTranslationY(float) translationY} property to be the difference between | |
| * the y value passed in and the current {@link #getTop() top} property. | |
| * | |
| * @param y The visual y position of this view, in pixels. | |
| */ | |
| public void setY(float y) { | |
| setTranslationY(y - mTop); | |
| } | |
| /** | |
| * The visual z position of this view, in pixels. This is equivalent to the | |
| * {@link #setTranslationZ(float) translationZ} property plus the current | |
| * {@link #getElevation() elevation} property. | |
| * | |
| * @return The visual z position of this view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getZ() { | |
| return getElevation() + getTranslationZ(); | |
| } | |
| /** | |
| * Sets the visual z position of this view, in pixels. This is equivalent to setting the | |
| * {@link #setTranslationZ(float) translationZ} property to be the difference between | |
| * the x value passed in and the current {@link #getElevation() elevation} property. | |
| * | |
| * @param z The visual z position of this view, in pixels. | |
| */ | |
| public void setZ(float z) { | |
| setTranslationZ(z - getElevation()); | |
| } | |
| /** | |
| * The base elevation of this view relative to its parent, in pixels. | |
| * | |
| * @return The base depth position of the view, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getElevation() { | |
| return mRenderNode.getElevation(); | |
| } | |
| /** | |
| * Sets the base elevation of this view, in pixels. | |
| * | |
| * @attr ref android.R.styleable#View_elevation | |
| */ | |
| public void setElevation(float elevation) { | |
| if (elevation != getElevation()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setElevation(elevation); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| } | |
| /** | |
| * The horizontal location of this view relative to its {@link #getLeft() left} position. | |
| * This position is post-layout, in addition to wherever the object's | |
| * layout placed it. | |
| * | |
| * @return The horizontal position of this view relative to its left position, in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getTranslationX() { | |
| return mRenderNode.getTranslationX(); | |
| } | |
| /** | |
| * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. | |
| * This effectively positions the object post-layout, in addition to wherever the object's | |
| * layout placed it. | |
| * | |
| * @param translationX The horizontal position of this view relative to its left position, | |
| * in pixels. | |
| * | |
| * @attr ref android.R.styleable#View_translationX | |
| */ | |
| public void setTranslationX(float translationX) { | |
| if (translationX != getTranslationX()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setTranslationX(translationX); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The vertical location of this view relative to its {@link #getTop() top} position. | |
| * This position is post-layout, in addition to wherever the object's | |
| * layout placed it. | |
| * | |
| * @return The vertical position of this view relative to its top position, | |
| * in pixels. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getTranslationY() { | |
| return mRenderNode.getTranslationY(); | |
| } | |
| /** | |
| * Sets the vertical location of this view relative to its {@link #getTop() top} position. | |
| * This effectively positions the object post-layout, in addition to wherever the object's | |
| * layout placed it. | |
| * | |
| * @param translationY The vertical position of this view relative to its top position, | |
| * in pixels. | |
| * | |
| * @attr ref android.R.styleable#View_translationY | |
| */ | |
| public void setTranslationY(float translationY) { | |
| if (translationY != getTranslationY()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setTranslationY(translationY); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * The depth location of this view relative to its {@link #getElevation() elevation}. | |
| * | |
| * @return The depth of this view relative to its elevation. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public float getTranslationZ() { | |
| return mRenderNode.getTranslationZ(); | |
| } | |
| /** | |
| * Sets the depth location of this view relative to its {@link #getElevation() elevation}. | |
| * | |
| * @attr ref android.R.styleable#View_translationZ | |
| */ | |
| public void setTranslationZ(float translationZ) { | |
| if (translationZ != getTranslationZ()) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setTranslationZ(translationZ); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| } | |
| /** @hide */ | |
| public void setAnimationMatrix(Matrix matrix) { | |
| invalidateViewProperty(true, false); | |
| mRenderNode.setAnimationMatrix(matrix); | |
| invalidateViewProperty(false, true); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } | |
| /** | |
| * Returns the current StateListAnimator if exists. | |
| * | |
| * @return StateListAnimator or null if it does not exists | |
| * @see #setStateListAnimator(android.animation.StateListAnimator) | |
| */ | |
| public StateListAnimator getStateListAnimator() { | |
| return mStateListAnimator; | |
| } | |
| /** | |
| * Attaches the provided StateListAnimator to this View. | |
| * <p> | |
| * Any previously attached StateListAnimator will be detached. | |
| * | |
| * @param stateListAnimator The StateListAnimator to update the view | |
| * @see {@link android.animation.StateListAnimator} | |
| */ | |
| public void setStateListAnimator(StateListAnimator stateListAnimator) { | |
| if (mStateListAnimator == stateListAnimator) { | |
| return; | |
| } | |
| if (mStateListAnimator != null) { | |
| mStateListAnimator.setTarget(null); | |
| } | |
| mStateListAnimator = stateListAnimator; | |
| if (stateListAnimator != null) { | |
| stateListAnimator.setTarget(this); | |
| if (isAttachedToWindow()) { | |
| stateListAnimator.setState(getDrawableState()); | |
| } | |
| } | |
| } | |
| /** | |
| * Returns whether the Outline should be used to clip the contents of the View. | |
| * <p> | |
| * Note that this flag will only be respected if the View's Outline returns true from | |
| * {@link Outline#canClip()}. | |
| * | |
| * @see #setOutlineProvider(ViewOutlineProvider) | |
| * @see #setClipToOutline(boolean) | |
| */ | |
| public final boolean getClipToOutline() { | |
| return mRenderNode.getClipToOutline(); | |
| } | |
| /** | |
| * Sets whether the View's Outline should be used to clip the contents of the View. | |
| * <p> | |
| * Only a single non-rectangular clip can be applied on a View at any time. | |
| * Circular clips from a {@link ViewAnimationUtils#createCircularReveal(View, int, int, float, float) | |
| * circular reveal} animation take priority over Outline clipping, and | |
| * child Outline clipping takes priority over Outline clipping done by a | |
| * parent. | |
| * <p> | |
| * Note that this flag will only be respected if the View's Outline returns true from | |
| * {@link Outline#canClip()}. | |
| * | |
| * @see #setOutlineProvider(ViewOutlineProvider) | |
| * @see #getClipToOutline() | |
| */ | |
| public void setClipToOutline(boolean clipToOutline) { | |
| damageInParent(); | |
| if (getClipToOutline() != clipToOutline) { | |
| mRenderNode.setClipToOutline(clipToOutline); | |
| } | |
| } | |
| // correspond to the enum values of View_outlineProvider | |
| private static final int PROVIDER_BACKGROUND = 0; | |
| private static final int PROVIDER_NONE = 1; | |
| private static final int PROVIDER_BOUNDS = 2; | |
| private static final int PROVIDER_PADDED_BOUNDS = 3; | |
| private void setOutlineProviderFromAttribute(int providerInt) { | |
| switch (providerInt) { | |
| case PROVIDER_BACKGROUND: | |
| setOutlineProvider(ViewOutlineProvider.BACKGROUND); | |
| break; | |
| case PROVIDER_NONE: | |
| setOutlineProvider(null); | |
| break; | |
| case PROVIDER_BOUNDS: | |
| setOutlineProvider(ViewOutlineProvider.BOUNDS); | |
| break; | |
| case PROVIDER_PADDED_BOUNDS: | |
| setOutlineProvider(ViewOutlineProvider.PADDED_BOUNDS); | |
| break; | |
| } | |
| } | |
| /** | |
| * Sets the {@link ViewOutlineProvider} of the view, which generates the Outline that defines | |
| * the shape of the shadow it casts, and enables outline clipping. | |
| * <p> | |
| * The default ViewOutlineProvider, {@link ViewOutlineProvider#BACKGROUND}, queries the Outline | |
| * from the View's background drawable, via {@link Drawable#getOutline(Outline)}. Changing the | |
| * outline provider with this method allows this behavior to be overridden. | |
| * <p> | |
| * If the ViewOutlineProvider is null, if querying it for an outline returns false, | |
| * or if the produced Outline is {@link Outline#isEmpty()}, shadows will not be cast. | |
| * <p> | |
| * Only outlines that return true from {@link Outline#canClip()} may be used for clipping. | |
| * | |
| * @see #setClipToOutline(boolean) | |
| * @see #getClipToOutline() | |
| * @see #getOutlineProvider() | |
| */ | |
| public void setOutlineProvider(ViewOutlineProvider provider) { | |
| mOutlineProvider = provider; | |
| invalidateOutline(); | |
| } | |
| /** | |
| * Returns the current {@link ViewOutlineProvider} of the view, which generates the Outline | |
| * that defines the shape of the shadow it casts, and enables outline clipping. | |
| * | |
| * @see #setOutlineProvider(ViewOutlineProvider) | |
| */ | |
| public ViewOutlineProvider getOutlineProvider() { | |
| return mOutlineProvider; | |
| } | |
| /** | |
| * Called to rebuild this View's Outline from its {@link ViewOutlineProvider outline provider} | |
| * | |
| * @see #setOutlineProvider(ViewOutlineProvider) | |
| */ | |
| public void invalidateOutline() { | |
| rebuildOutline(); | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| invalidateViewProperty(false, false); | |
| } | |
| /** | |
| * Internal version of {@link #invalidateOutline()} which invalidates the | |
| * outline without invalidating the view itself. This is intended to be called from | |
| * within methods in the View class itself which are the result of the view being | |
| * invalidated already. For example, when we are drawing the background of a View, | |
| * we invalidate the outline in case it changed in the meantime, but we do not | |
| * need to invalidate the view because we're already drawing the background as part | |
| * of drawing the view in response to an earlier invalidation of the view. | |
| */ | |
| private void rebuildOutline() { | |
| // Unattached views ignore this signal, and outline is recomputed in onAttachedToWindow() | |
| if (mAttachInfo == null) return; | |
| if (mOutlineProvider == null) { | |
| // no provider, remove outline | |
| mRenderNode.setOutline(null); | |
| } else { | |
| final Outline outline = mAttachInfo.mTmpOutline; | |
| outline.setEmpty(); | |
| outline.setAlpha(1.0f); | |
| mOutlineProvider.getOutline(this, outline); | |
| mRenderNode.setOutline(outline); | |
| } | |
| } | |
| /** | |
| * HierarchyViewer only | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean hasShadow() { | |
| return mRenderNode.hasShadow(); | |
| } | |
| /** @hide */ | |
| public void setRevealClip(boolean shouldClip, float x, float y, float radius) { | |
| mRenderNode.setRevealClip(shouldClip, x, y, radius); | |
| invalidateViewProperty(false, false); | |
| } | |
| /** | |
| * Hit rectangle in parent's coordinates | |
| * | |
| * @param outRect The hit rectangle of the view. | |
| */ | |
| public void getHitRect(Rect outRect) { | |
| if (hasIdentityMatrix() || mAttachInfo == null) { | |
| outRect.set(mLeft, mTop, mRight, mBottom); | |
| } else { | |
| final RectF tmpRect = mAttachInfo.mTmpTransformRect; | |
| tmpRect.set(0, 0, getWidth(), getHeight()); | |
| getMatrix().mapRect(tmpRect); // TODO: mRenderNode.mapRect(tmpRect) | |
| outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, | |
| (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); | |
| } | |
| } | |
| /** | |
| * Determines whether the given point, in local coordinates is inside the view. | |
| */ | |
| /*package*/ final boolean pointInView(float localX, float localY) { | |
| return localX >= 0 && localX < (mRight - mLeft) | |
| && localY >= 0 && localY < (mBottom - mTop); | |
| } | |
| /** | |
| * Utility method to determine whether the given point, in local coordinates, | |
| * is inside the view, where the area of the view is expanded by the slop factor. | |
| * This method is called while processing touch-move events to determine if the event | |
| * is still within the view. | |
| * | |
| * @hide | |
| */ | |
| public boolean pointInView(float localX, float localY, float slop) { | |
| return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && | |
| localY < ((mBottom - mTop) + slop); | |
| } | |
| /** | |
| * When a view has focus and the user navigates away from it, the next view is searched for | |
| * starting from the rectangle filled in by this method. | |
| * | |
| * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) | |
| * of the view. However, if your view maintains some idea of internal selection, | |
| * such as a cursor, or a selected row or column, you should override this method and | |
| * fill in a more specific rectangle. | |
| * | |
| * @param r The rectangle to fill in, in this view's coordinates. | |
| */ | |
| public void getFocusedRect(Rect r) { | |
| getDrawingRect(r); | |
| } | |
| /** | |
| * If some part of this view is not clipped by any of its parents, then | |
| * return that area in r in global (root) coordinates. To convert r to local | |
| * coordinates (without taking possible View rotations into account), offset | |
| * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). | |
| * If the view is completely clipped or translated out, return false. | |
| * | |
| * @param r If true is returned, r holds the global coordinates of the | |
| * visible portion of this view. | |
| * @param globalOffset If true is returned, globalOffset holds the dx,dy | |
| * between this view and its root. globalOffet may be null. | |
| * @return true if r is non-empty (i.e. part of the view is visible at the | |
| * root level. | |
| */ | |
| public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { | |
| int width = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| if (width > 0 && height > 0) { | |
| r.set(0, 0, width, height); | |
| if (globalOffset != null) { | |
| globalOffset.set(-mScrollX, -mScrollY); | |
| } | |
| return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); | |
| } | |
| return false; | |
| } | |
| public final boolean getGlobalVisibleRect(Rect r) { | |
| return getGlobalVisibleRect(r, null); | |
| } | |
| public final boolean getLocalVisibleRect(Rect r) { | |
| final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); | |
| if (getGlobalVisibleRect(r, offset)) { | |
| r.offset(-offset.x, -offset.y); // make r local | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Offset this view's vertical location by the specified number of pixels. | |
| * | |
| * @param offset the number of pixels to offset the view by | |
| */ | |
| public void offsetTopAndBottom(int offset) { | |
| if (offset != 0) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (isHardwareAccelerated()) { | |
| invalidateViewProperty(false, false); | |
| } else { | |
| final ViewParent p = mParent; | |
| if (p != null && mAttachInfo != null) { | |
| final Rect r = mAttachInfo.mTmpInvalRect; | |
| int minTop; | |
| int maxBottom; | |
| int yLoc; | |
| if (offset < 0) { | |
| minTop = mTop + offset; | |
| maxBottom = mBottom; | |
| yLoc = offset; | |
| } else { | |
| minTop = mTop; | |
| maxBottom = mBottom + offset; | |
| yLoc = 0; | |
| } | |
| r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); | |
| p.invalidateChild(this, r); | |
| } | |
| } | |
| } else { | |
| invalidateViewProperty(false, false); | |
| } | |
| mTop += offset; | |
| mBottom += offset; | |
| mRenderNode.offsetTopAndBottom(offset); | |
| if (isHardwareAccelerated()) { | |
| invalidateViewProperty(false, false); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } else { | |
| if (!matrixIsIdentity) { | |
| invalidateViewProperty(false, true); | |
| } | |
| invalidateParentIfNeeded(); | |
| } | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * Offset this view's horizontal location by the specified amount of pixels. | |
| * | |
| * @param offset the number of pixels to offset the view by | |
| */ | |
| public void offsetLeftAndRight(int offset) { | |
| if (offset != 0) { | |
| final boolean matrixIsIdentity = hasIdentityMatrix(); | |
| if (matrixIsIdentity) { | |
| if (isHardwareAccelerated()) { | |
| invalidateViewProperty(false, false); | |
| } else { | |
| final ViewParent p = mParent; | |
| if (p != null && mAttachInfo != null) { | |
| final Rect r = mAttachInfo.mTmpInvalRect; | |
| int minLeft; | |
| int maxRight; | |
| if (offset < 0) { | |
| minLeft = mLeft + offset; | |
| maxRight = mRight; | |
| } else { | |
| minLeft = mLeft; | |
| maxRight = mRight + offset; | |
| } | |
| r.set(0, 0, maxRight - minLeft, mBottom - mTop); | |
| p.invalidateChild(this, r); | |
| } | |
| } | |
| } else { | |
| invalidateViewProperty(false, false); | |
| } | |
| mLeft += offset; | |
| mRight += offset; | |
| mRenderNode.offsetLeftAndRight(offset); | |
| if (isHardwareAccelerated()) { | |
| invalidateViewProperty(false, false); | |
| invalidateParentIfNeededAndWasQuickRejected(); | |
| } else { | |
| if (!matrixIsIdentity) { | |
| invalidateViewProperty(false, true); | |
| } | |
| invalidateParentIfNeeded(); | |
| } | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| } | |
| /** | |
| * Get the LayoutParams associated with this view. All views should have | |
| * layout parameters. These supply parameters to the <i>parent</i> of this | |
| * view specifying how it should be arranged. There are many subclasses of | |
| * ViewGroup.LayoutParams, and these correspond to the different subclasses | |
| * of ViewGroup that are responsible for arranging their children. | |
| * | |
| * This method may return null if this View is not attached to a parent | |
| * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} | |
| * was not invoked successfully. When a View is attached to a parent | |
| * ViewGroup, this method must not return null. | |
| * | |
| * @return The LayoutParams associated with this view, or null if no | |
| * parameters have been set yet | |
| */ | |
| @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") | |
| public ViewGroup.LayoutParams getLayoutParams() { | |
| return mLayoutParams; | |
| } | |
| /** | |
| * Set the layout parameters associated with this view. These supply | |
| * parameters to the <i>parent</i> of this view specifying how it should be | |
| * arranged. There are many subclasses of ViewGroup.LayoutParams, and these | |
| * correspond to the different subclasses of ViewGroup that are responsible | |
| * for arranging their children. | |
| * | |
| * @param params The layout parameters for this view, cannot be null | |
| */ | |
| public void setLayoutParams(ViewGroup.LayoutParams params) { | |
| if (params == null) { | |
| throw new NullPointerException("Layout parameters cannot be null"); | |
| } | |
| mLayoutParams = params; | |
| resolveLayoutParams(); | |
| if (mParent instanceof ViewGroup) { | |
| ((ViewGroup) mParent).onSetLayoutParams(this, params); | |
| } | |
| requestLayout(); | |
| } | |
| /** | |
| * Resolve the layout parameters depending on the resolved layout direction | |
| * | |
| * @hide | |
| */ | |
| public void resolveLayoutParams() { | |
| if (mLayoutParams != null) { | |
| mLayoutParams.resolveLayoutDirection(getLayoutDirection()); | |
| } | |
| } | |
| /** | |
| * Set the scrolled position of your view. This will cause a call to | |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be | |
| * invalidated. | |
| * @param x the x position to scroll to | |
| * @param y the y position to scroll to | |
| */ | |
| public void scrollTo(int x, int y) { | |
| if (mScrollX != x || mScrollY != y) { | |
| int oldX = mScrollX; | |
| int oldY = mScrollY; | |
| mScrollX = x; | |
| mScrollY = y; | |
| invalidateParentCaches(); | |
| onScrollChanged(mScrollX, mScrollY, oldX, oldY); | |
| if (!awakenScrollBars()) { | |
| postInvalidateOnAnimation(); | |
| } | |
| } | |
| } | |
| /** | |
| * Move the scrolled position of your view. This will cause a call to | |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be | |
| * invalidated. | |
| * @param x the amount of pixels to scroll by horizontally | |
| * @param y the amount of pixels to scroll by vertically | |
| */ | |
| public void scrollBy(int x, int y) { | |
| scrollTo(mScrollX + x, mScrollY + y); | |
| } | |
| /** | |
| * <p>Trigger the scrollbars to draw. When invoked this method starts an | |
| * animation to fade the scrollbars out after a default delay. If a subclass | |
| * provides animated scrolling, the start delay should equal the duration | |
| * of the scrolling animation.</p> | |
| * | |
| * <p>The animation starts only if at least one of the scrollbars is | |
| * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and | |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, | |
| * this method returns true, and false otherwise. If the animation is | |
| * started, this method calls {@link #invalidate()}; in that case the | |
| * caller should not call {@link #invalidate()}.</p> | |
| * | |
| * <p>This method should be invoked every time a subclass directly updates | |
| * the scroll parameters.</p> | |
| * | |
| * <p>This method is automatically invoked by {@link #scrollBy(int, int)} | |
| * and {@link #scrollTo(int, int)}.</p> | |
| * | |
| * @return true if the animation is played, false otherwise | |
| * | |
| * @see #awakenScrollBars(int) | |
| * @see #scrollBy(int, int) | |
| * @see #scrollTo(int, int) | |
| * @see #isHorizontalScrollBarEnabled() | |
| * @see #isVerticalScrollBarEnabled() | |
| * @see #setHorizontalScrollBarEnabled(boolean) | |
| * @see #setVerticalScrollBarEnabled(boolean) | |
| */ | |
| protected boolean awakenScrollBars() { | |
| return mScrollCache != null && | |
| awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); | |
| } | |
| /** | |
| * Trigger the scrollbars to draw. | |
| * This method differs from awakenScrollBars() only in its default duration. | |
| * initialAwakenScrollBars() will show the scroll bars for longer than | |
| * usual to give the user more of a chance to notice them. | |
| * | |
| * @return true if the animation is played, false otherwise. | |
| */ | |
| private boolean initialAwakenScrollBars() { | |
| return mScrollCache != null && | |
| awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); | |
| } | |
| /** | |
| * <p> | |
| * Trigger the scrollbars to draw. When invoked this method starts an | |
| * animation to fade the scrollbars out after a fixed delay. If a subclass | |
| * provides animated scrolling, the start delay should equal the duration of | |
| * the scrolling animation. | |
| * </p> | |
| * | |
| * <p> | |
| * The animation starts only if at least one of the scrollbars is enabled, | |
| * as specified by {@link #isHorizontalScrollBarEnabled()} and | |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, | |
| * this method returns true, and false otherwise. If the animation is | |
| * started, this method calls {@link #invalidate()}; in that case the caller | |
| * should not call {@link #invalidate()}. | |
| * </p> | |
| * | |
| * <p> | |
| * This method should be invoked every time a subclass directly updates the | |
| * scroll parameters. | |
| * </p> | |
| * | |
| * @param startDelay the delay, in milliseconds, after which the animation | |
| * should start; when the delay is 0, the animation starts | |
| * immediately | |
| * @return true if the animation is played, false otherwise | |
| * | |
| * @see #scrollBy(int, int) | |
| * @see #scrollTo(int, int) | |
| * @see #isHorizontalScrollBarEnabled() | |
| * @see #isVerticalScrollBarEnabled() | |
| * @see #setHorizontalScrollBarEnabled(boolean) | |
| * @see #setVerticalScrollBarEnabled(boolean) | |
| */ | |
| protected boolean awakenScrollBars(int startDelay) { | |
| return awakenScrollBars(startDelay, true); | |
| } | |
| /** | |
| * <p> | |
| * Trigger the scrollbars to draw. When invoked this method starts an | |
| * animation to fade the scrollbars out after a fixed delay. If a subclass | |
| * provides animated scrolling, the start delay should equal the duration of | |
| * the scrolling animation. | |
| * </p> | |
| * | |
| * <p> | |
| * The animation starts only if at least one of the scrollbars is enabled, | |
| * as specified by {@link #isHorizontalScrollBarEnabled()} and | |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, | |
| * this method returns true, and false otherwise. If the animation is | |
| * started, this method calls {@link #invalidate()} if the invalidate parameter | |
| * is set to true; in that case the caller | |
| * should not call {@link #invalidate()}. | |
| * </p> | |
| * | |
| * <p> | |
| * This method should be invoked every time a subclass directly updates the | |
| * scroll parameters. | |
| * </p> | |
| * | |
| * @param startDelay the delay, in milliseconds, after which the animation | |
| * should start; when the delay is 0, the animation starts | |
| * immediately | |
| * | |
| * @param invalidate Whether this method should call invalidate | |
| * | |
| * @return true if the animation is played, false otherwise | |
| * | |
| * @see #scrollBy(int, int) | |
| * @see #scrollTo(int, int) | |
| * @see #isHorizontalScrollBarEnabled() | |
| * @see #isVerticalScrollBarEnabled() | |
| * @see #setHorizontalScrollBarEnabled(boolean) | |
| * @see #setVerticalScrollBarEnabled(boolean) | |
| */ | |
| protected boolean awakenScrollBars(int startDelay, boolean invalidate) { | |
| final ScrollabilityCache scrollCache = mScrollCache; | |
| if (scrollCache == null || !scrollCache.fadeScrollBars) { | |
| return false; | |
| } | |
| if (scrollCache.scrollBar == null) { | |
| scrollCache.scrollBar = new ScrollBarDrawable(); | |
| scrollCache.scrollBar.setCallback(this); | |
| scrollCache.scrollBar.setState(getDrawableState()); | |
| } | |
| if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { | |
| if (invalidate) { | |
| // Invalidate to show the scrollbars | |
| postInvalidateOnAnimation(); | |
| } | |
| if (scrollCache.state == ScrollabilityCache.OFF) { | |
| // FIXME: this is copied from WindowManagerService. | |
| // We should get this value from the system when it | |
| // is possible to do so. | |
| final int KEY_REPEAT_FIRST_DELAY = 750; | |
| startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); | |
| } | |
| // Tell mScrollCache when we should start fading. This may | |
| // extend the fade start time if one was already scheduled | |
| long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; | |
| scrollCache.fadeStartTime = fadeStartTime; | |
| scrollCache.state = ScrollabilityCache.ON; | |
| // Schedule our fader to run, unscheduling any old ones first | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mHandler.removeCallbacks(scrollCache); | |
| mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); | |
| } | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Do not invalidate views which are not visible and which are not running an animation. They | |
| * will not get drawn and they should not set dirty flags as if they will be drawn | |
| */ | |
| private boolean skipInvalidate() { | |
| return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && | |
| (!(mParent instanceof ViewGroup) || | |
| !((ViewGroup) mParent).isViewTransitioning(this)); | |
| } | |
| /** | |
| * Mark the area defined by dirty as needing to be drawn. If the view is | |
| * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some | |
| * point in the future. | |
| * <p> | |
| * This must be called from a UI thread. To call from a non-UI thread, call | |
| * {@link #postInvalidate()}. | |
| * <p> | |
| * <b>WARNING:</b> In API 19 and below, this method may be destructive to | |
| * {@code dirty}. | |
| * | |
| * @param dirty the rectangle representing the bounds of the dirty region | |
| */ | |
| public void invalidate(Rect dirty) { | |
| final int scrollX = mScrollX; | |
| final int scrollY = mScrollY; | |
| invalidateInternal(dirty.left - scrollX, dirty.top - scrollY, | |
| dirty.right - scrollX, dirty.bottom - scrollY, true, false); | |
| } | |
| /** | |
| * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. The | |
| * coordinates of the dirty rect are relative to the view. If the view is | |
| * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some | |
| * point in the future. | |
| * <p> | |
| * This must be called from a UI thread. To call from a non-UI thread, call | |
| * {@link #postInvalidate()}. | |
| * | |
| * @param l the left position of the dirty region | |
| * @param t the top position of the dirty region | |
| * @param r the right position of the dirty region | |
| * @param b the bottom position of the dirty region | |
| */ | |
| public void invalidate(int l, int t, int r, int b) { | |
| final int scrollX = mScrollX; | |
| final int scrollY = mScrollY; | |
| invalidateInternal(l - scrollX, t - scrollY, r - scrollX, b - scrollY, true, false); | |
| } | |
| /** | |
| * Invalidate the whole view. If the view is visible, | |
| * {@link #onDraw(android.graphics.Canvas)} will be called at some point in | |
| * the future. | |
| * <p> | |
| * This must be called from a UI thread. To call from a non-UI thread, call | |
| * {@link #postInvalidate()}. | |
| */ | |
| public void invalidate() { | |
| invalidate(true); | |
| } | |
| /** | |
| * This is where the invalidate() work actually happens. A full invalidate() | |
| * causes the drawing cache to be invalidated, but this function can be | |
| * called with invalidateCache set to false to skip that invalidation step | |
| * for cases that do not need it (for example, a component that remains at | |
| * the same dimensions with the same content). | |
| * | |
| * @param invalidateCache Whether the drawing cache for this view should be | |
| * invalidated as well. This is usually true for a full | |
| * invalidate, but may be set to false if the View's contents or | |
| * dimensions have not changed. | |
| */ | |
| void invalidate(boolean invalidateCache) { | |
| invalidateInternal(0, 0, mRight - mLeft, mBottom - mTop, invalidateCache, true); | |
| } | |
| void invalidateInternal(int l, int t, int r, int b, boolean invalidateCache, | |
| boolean fullInvalidate) { | |
| if (mGhostView != null) { | |
| mGhostView.invalidate(true); | |
| return; | |
| } | |
| if (skipInvalidate()) { | |
| return; | |
| } | |
| if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) | |
| || (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) | |
| || (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED | |
| || (fullInvalidate && isOpaque() != mLastIsOpaque)) { | |
| if (fullInvalidate) { | |
| mLastIsOpaque = isOpaque(); | |
| mPrivateFlags &= ~PFLAG_DRAWN; | |
| } | |
| mPrivateFlags |= PFLAG_DIRTY; | |
| if (invalidateCache) { | |
| mPrivateFlags |= PFLAG_INVALIDATED; | |
| mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; | |
| } | |
| // Propagate the damage rectangle to the parent view. | |
| final AttachInfo ai = mAttachInfo; | |
| final ViewParent p = mParent; | |
| if (p != null && ai != null && l < r && t < b) { | |
| final Rect damage = ai.mTmpInvalRect; | |
| damage.set(l, t, r, b); | |
| p.invalidateChild(this, damage); | |
| } | |
| // Damage the entire projection receiver, if necessary. | |
| if (mBackground != null && mBackground.isProjected()) { | |
| final View receiver = getProjectionReceiver(); | |
| if (receiver != null) { | |
| receiver.damageInParent(); | |
| } | |
| } | |
| // Damage the entire IsolatedZVolume receiving this view's shadow. | |
| if (isHardwareAccelerated() && getZ() != 0) { | |
| damageShadowReceiver(); | |
| } | |
| } | |
| } | |
| /** | |
| * @return this view's projection receiver, or {@code null} if none exists | |
| */ | |
| private View getProjectionReceiver() { | |
| ViewParent p = getParent(); | |
| while (p != null && p instanceof View) { | |
| final View v = (View) p; | |
| if (v.isProjectionReceiver()) { | |
| return v; | |
| } | |
| p = p.getParent(); | |
| } | |
| return null; | |
| } | |
| /** | |
| * @return whether the view is a projection receiver | |
| */ | |
| private boolean isProjectionReceiver() { | |
| return mBackground != null; | |
| } | |
| /** | |
| * Damage area of the screen that can be covered by this View's shadow. | |
| * | |
| * This method will guarantee that any changes to shadows cast by a View | |
| * are damaged on the screen for future redraw. | |
| */ | |
| private void damageShadowReceiver() { | |
| final AttachInfo ai = mAttachInfo; | |
| if (ai != null) { | |
| ViewParent p = getParent(); | |
| if (p != null && p instanceof ViewGroup) { | |
| final ViewGroup vg = (ViewGroup) p; | |
| vg.damageInParent(); | |
| } | |
| } | |
| } | |
| /** | |
| * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to | |
| * set any flags or handle all of the cases handled by the default invalidation methods. | |
| * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate | |
| * dirty rect. This method calls into fast invalidation methods in ViewGroup that | |
| * walk up the hierarchy, transforming the dirty rect as necessary. | |
| * | |
| * The method also handles normal invalidation logic if display list properties are not | |
| * being used in this view. The invalidateParent and forceRedraw flags are used by that | |
| * backup approach, to handle these cases used in the various property-setting methods. | |
| * | |
| * @param invalidateParent Force a call to invalidateParentCaches() if display list properties | |
| * are not being used in this view | |
| * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display | |
| * list properties are not being used in this view | |
| */ | |
| void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { | |
| if (!isHardwareAccelerated() | |
| || !mRenderNode.isValid() | |
| || (mPrivateFlags & PFLAG_DRAW_ANIMATION) != 0) { | |
| if (invalidateParent) { | |
| invalidateParentCaches(); | |
| } | |
| if (forceRedraw) { | |
| mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation | |
| } | |
| invalidate(false); | |
| } else { | |
| damageInParent(); | |
| } | |
| if (isHardwareAccelerated() && invalidateParent && getZ() != 0) { | |
| damageShadowReceiver(); | |
| } | |
| } | |
| /** | |
| * Tells the parent view to damage this view's bounds. | |
| * | |
| * @hide | |
| */ | |
| protected void damageInParent() { | |
| final AttachInfo ai = mAttachInfo; | |
| final ViewParent p = mParent; | |
| if (p != null && ai != null) { | |
| final Rect r = ai.mTmpInvalRect; | |
| r.set(0, 0, mRight - mLeft, mBottom - mTop); | |
| if (mParent instanceof ViewGroup) { | |
| ((ViewGroup) mParent).damageChild(this, r); | |
| } else { | |
| mParent.invalidateChild(this, r); | |
| } | |
| } | |
| } | |
| /** | |
| * Utility method to transform a given Rect by the current matrix of this view. | |
| */ | |
| void transformRect(final Rect rect) { | |
| if (!getMatrix().isIdentity()) { | |
| RectF boundingRect = mAttachInfo.mTmpTransformRect; | |
| boundingRect.set(rect); | |
| getMatrix().mapRect(boundingRect); | |
| rect.set((int) Math.floor(boundingRect.left), | |
| (int) Math.floor(boundingRect.top), | |
| (int) Math.ceil(boundingRect.right), | |
| (int) Math.ceil(boundingRect.bottom)); | |
| } | |
| } | |
| /** | |
| * Used to indicate that the parent of this view should clear its caches. This functionality | |
| * is used to force the parent to rebuild its display list (when hardware-accelerated), | |
| * which is necessary when various parent-managed properties of the view change, such as | |
| * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only | |
| * clears the parent caches and does not causes an invalidate event. | |
| * | |
| * @hide | |
| */ | |
| protected void invalidateParentCaches() { | |
| if (mParent instanceof View) { | |
| ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; | |
| } | |
| } | |
| /** | |
| * Used to indicate that the parent of this view should be invalidated. This functionality | |
| * is used to force the parent to rebuild its display list (when hardware-accelerated), | |
| * which is necessary when various parent-managed properties of the view change, such as | |
| * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate | |
| * an invalidation event to the parent. | |
| * | |
| * @hide | |
| */ | |
| protected void invalidateParentIfNeeded() { | |
| if (isHardwareAccelerated() && mParent instanceof View) { | |
| ((View) mParent).invalidate(true); | |
| } | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected void invalidateParentIfNeededAndWasQuickRejected() { | |
| if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) != 0) { | |
| // View was rejected last time it was drawn by its parent; this may have changed | |
| invalidateParentIfNeeded(); | |
| } | |
| } | |
| /** | |
| * Indicates whether this View is opaque. An opaque View guarantees that it will | |
| * draw all the pixels overlapping its bounds using a fully opaque color. | |
| * | |
| * Subclasses of View should override this method whenever possible to indicate | |
| * whether an instance is opaque. Opaque Views are treated in a special way by | |
| * the View hierarchy, possibly allowing it to perform optimizations during | |
| * invalidate/draw passes. | |
| * | |
| * @return True if this View is guaranteed to be fully opaque, false otherwise. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean isOpaque() { | |
| return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && | |
| getFinalAlpha() >= 1.0f; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected void computeOpaqueFlags() { | |
| // Opaque if: | |
| // - Has a background | |
| // - Background is opaque | |
| // - Doesn't have scrollbars or scrollbars overlay | |
| if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { | |
| mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; | |
| } else { | |
| mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; | |
| } | |
| final int flags = mViewFlags; | |
| if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || | |
| (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY || | |
| (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_OUTSIDE_OVERLAY) { | |
| mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; | |
| } else { | |
| mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; | |
| } | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected boolean hasOpaqueScrollbars() { | |
| return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; | |
| } | |
| /** | |
| * @return A handler associated with the thread running the View. This | |
| * handler can be used to pump events in the UI events queue. | |
| */ | |
| public Handler getHandler() { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| return attachInfo.mHandler; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Gets the view root associated with the View. | |
| * @return The view root, or null if none. | |
| * @hide | |
| */ | |
| public ViewRootImpl getViewRootImpl() { | |
| if (mAttachInfo != null) { | |
| return mAttachInfo.mViewRootImpl; | |
| } | |
| return null; | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public HardwareRenderer getHardwareRenderer() { | |
| return mAttachInfo != null ? mAttachInfo.mHardwareRenderer : null; | |
| } | |
| /** | |
| * <p>Causes the Runnable to be added to the message queue. | |
| * The runnable will be run on the user interface thread.</p> | |
| * | |
| * @param action The Runnable that will be executed. | |
| * | |
| * @return Returns true if the Runnable was successfully placed in to the | |
| * message queue. Returns false on failure, usually because the | |
| * looper processing the message queue is exiting. | |
| * | |
| * @see #postDelayed | |
| * @see #removeCallbacks | |
| */ | |
| public boolean post(Runnable action) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| return attachInfo.mHandler.post(action); | |
| } | |
| // Assume that post will succeed later | |
| ViewRootImpl.getRunQueue().post(action); | |
| return true; | |
| } | |
| /** | |
| * <p>Causes the Runnable to be added to the message queue, to be run | |
| * after the specified amount of time elapses. | |
| * The runnable will be run on the user interface thread.</p> | |
| * | |
| * @param action The Runnable that will be executed. | |
| * @param delayMillis The delay (in milliseconds) until the Runnable | |
| * will be executed. | |
| * | |
| * @return true if the Runnable was successfully placed in to the | |
| * message queue. Returns false on failure, usually because the | |
| * looper processing the message queue is exiting. Note that a | |
| * result of true does not mean the Runnable will be processed -- | |
| * if the looper is quit before the delivery time of the message | |
| * occurs then the message will be dropped. | |
| * | |
| * @see #post | |
| * @see #removeCallbacks | |
| */ | |
| public boolean postDelayed(Runnable action, long delayMillis) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| return attachInfo.mHandler.postDelayed(action, delayMillis); | |
| } | |
| // Assume that post will succeed later | |
| ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); | |
| return true; | |
| } | |
| /** | |
| * <p>Causes the Runnable to execute on the next animation time step. | |
| * The runnable will be run on the user interface thread.</p> | |
| * | |
| * @param action The Runnable that will be executed. | |
| * | |
| * @see #postOnAnimationDelayed | |
| * @see #removeCallbacks | |
| */ | |
| public void postOnAnimation(Runnable action) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| attachInfo.mViewRootImpl.mChoreographer.postCallback( | |
| Choreographer.CALLBACK_ANIMATION, action, null); | |
| } else { | |
| // Assume that post will succeed later | |
| ViewRootImpl.getRunQueue().post(action); | |
| } | |
| } | |
| /** | |
| * <p>Causes the Runnable to execute on the next animation time step, | |
| * after the specified amount of time elapses. | |
| * The runnable will be run on the user interface thread.</p> | |
| * | |
| * @param action The Runnable that will be executed. | |
| * @param delayMillis The delay (in milliseconds) until the Runnable | |
| * will be executed. | |
| * | |
| * @see #postOnAnimation | |
| * @see #removeCallbacks | |
| */ | |
| public void postOnAnimationDelayed(Runnable action, long delayMillis) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( | |
| Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); | |
| } else { | |
| // Assume that post will succeed later | |
| ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); | |
| } | |
| } | |
| /** | |
| * <p>Removes the specified Runnable from the message queue.</p> | |
| * | |
| * @param action The Runnable to remove from the message handling queue | |
| * | |
| * @return true if this view could ask the Handler to remove the Runnable, | |
| * false otherwise. When the returned value is true, the Runnable | |
| * may or may not have been actually removed from the message queue | |
| * (for instance, if the Runnable was not in the queue already.) | |
| * | |
| * @see #post | |
| * @see #postDelayed | |
| * @see #postOnAnimation | |
| * @see #postOnAnimationDelayed | |
| */ | |
| public boolean removeCallbacks(Runnable action) { | |
| if (action != null) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| attachInfo.mHandler.removeCallbacks(action); | |
| attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( | |
| Choreographer.CALLBACK_ANIMATION, action, null); | |
| } | |
| // Assume that post will succeed later | |
| ViewRootImpl.getRunQueue().removeCallbacks(action); | |
| } | |
| return true; | |
| } | |
| /** | |
| * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. | |
| * Use this to invalidate the View from a non-UI thread.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @see #invalidate() | |
| * @see #postInvalidateDelayed(long) | |
| */ | |
| public void postInvalidate() { | |
| postInvalidateDelayed(0); | |
| } | |
| /** | |
| * <p>Cause an invalidate of the specified area to happen on a subsequent cycle | |
| * through the event loop. Use this to invalidate the View from a non-UI thread.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @param left The left coordinate of the rectangle to invalidate. | |
| * @param top The top coordinate of the rectangle to invalidate. | |
| * @param right The right coordinate of the rectangle to invalidate. | |
| * @param bottom The bottom coordinate of the rectangle to invalidate. | |
| * | |
| * @see #invalidate(int, int, int, int) | |
| * @see #invalidate(Rect) | |
| * @see #postInvalidateDelayed(long, int, int, int, int) | |
| */ | |
| public void postInvalidate(int left, int top, int right, int bottom) { | |
| postInvalidateDelayed(0, left, top, right, bottom); | |
| } | |
| /** | |
| * <p>Cause an invalidate to happen on a subsequent cycle through the event | |
| * loop. Waits for the specified amount of time.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @param delayMilliseconds the duration in milliseconds to delay the | |
| * invalidation by | |
| * | |
| * @see #invalidate() | |
| * @see #postInvalidate() | |
| */ | |
| public void postInvalidateDelayed(long delayMilliseconds) { | |
| // We try only with the AttachInfo because there's no point in invalidating | |
| // if we are not attached to our window | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); | |
| } | |
| } | |
| /** | |
| * <p>Cause an invalidate of the specified area to happen on a subsequent cycle | |
| * through the event loop. Waits for the specified amount of time.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @param delayMilliseconds the duration in milliseconds to delay the | |
| * invalidation by | |
| * @param left The left coordinate of the rectangle to invalidate. | |
| * @param top The top coordinate of the rectangle to invalidate. | |
| * @param right The right coordinate of the rectangle to invalidate. | |
| * @param bottom The bottom coordinate of the rectangle to invalidate. | |
| * | |
| * @see #invalidate(int, int, int, int) | |
| * @see #invalidate(Rect) | |
| * @see #postInvalidate(int, int, int, int) | |
| */ | |
| public void postInvalidateDelayed(long delayMilliseconds, int left, int top, | |
| int right, int bottom) { | |
| // We try only with the AttachInfo because there's no point in invalidating | |
| // if we are not attached to our window | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); | |
| info.target = this; | |
| info.left = left; | |
| info.top = top; | |
| info.right = right; | |
| info.bottom = bottom; | |
| attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); | |
| } | |
| } | |
| /** | |
| * <p>Cause an invalidate to happen on the next animation time step, typically the | |
| * next display frame.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @see #invalidate() | |
| */ | |
| public void postInvalidateOnAnimation() { | |
| // We try only with the AttachInfo because there's no point in invalidating | |
| // if we are not attached to our window | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); | |
| } | |
| } | |
| /** | |
| * <p>Cause an invalidate of the specified area to happen on the next animation | |
| * time step, typically the next display frame.</p> | |
| * | |
| * <p>This method can be invoked from outside of the UI thread | |
| * only when this View is attached to a window.</p> | |
| * | |
| * @param left The left coordinate of the rectangle to invalidate. | |
| * @param top The top coordinate of the rectangle to invalidate. | |
| * @param right The right coordinate of the rectangle to invalidate. | |
| * @param bottom The bottom coordinate of the rectangle to invalidate. | |
| * | |
| * @see #invalidate(int, int, int, int) | |
| * @see #invalidate(Rect) | |
| */ | |
| public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { | |
| // We try only with the AttachInfo because there's no point in invalidating | |
| // if we are not attached to our window | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo != null) { | |
| final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); | |
| info.target = this; | |
| info.left = left; | |
| info.top = top; | |
| info.right = right; | |
| info.bottom = bottom; | |
| attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); | |
| } | |
| } | |
| /** | |
| * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. | |
| * This event is sent at most once every | |
| * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. | |
| */ | |
| private void postSendViewScrolledAccessibilityEventCallback() { | |
| if (mSendViewScrolledAccessibilityEvent == null) { | |
| mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); | |
| } | |
| if (!mSendViewScrolledAccessibilityEvent.mIsPending) { | |
| mSendViewScrolledAccessibilityEvent.mIsPending = true; | |
| postDelayed(mSendViewScrolledAccessibilityEvent, | |
| ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); | |
| } | |
| } | |
| /** | |
| * Called by a parent to request that a child update its values for mScrollX | |
| * and mScrollY if necessary. This will typically be done if the child is | |
| * animating a scroll using a {@link android.widget.Scroller Scroller} | |
| * object. | |
| */ | |
| public void computeScroll() { | |
| } | |
| /** | |
| * <p>Indicate whether the horizontal edges are faded when the view is | |
| * scrolled horizontally.</p> | |
| * | |
| * @return true if the horizontal edges should are faded on scroll, false | |
| * otherwise | |
| * | |
| * @see #setHorizontalFadingEdgeEnabled(boolean) | |
| * | |
| * @attr ref android.R.styleable#View_requiresFadingEdge | |
| */ | |
| public boolean isHorizontalFadingEdgeEnabled() { | |
| return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; | |
| } | |
| /** | |
| * <p>Define whether the horizontal edges should be faded when this view | |
| * is scrolled horizontally.</p> | |
| * | |
| * @param horizontalFadingEdgeEnabled true if the horizontal edges should | |
| * be faded when the view is scrolled | |
| * horizontally | |
| * | |
| * @see #isHorizontalFadingEdgeEnabled() | |
| * | |
| * @attr ref android.R.styleable#View_requiresFadingEdge | |
| */ | |
| public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { | |
| if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { | |
| if (horizontalFadingEdgeEnabled) { | |
| initScrollCache(); | |
| } | |
| mViewFlags ^= FADING_EDGE_HORIZONTAL; | |
| } | |
| } | |
| /** | |
| * <p>Indicate whether the vertical edges are faded when the view is | |
| * scrolled horizontally.</p> | |
| * | |
| * @return true if the vertical edges should are faded on scroll, false | |
| * otherwise | |
| * | |
| * @see #setVerticalFadingEdgeEnabled(boolean) | |
| * | |
| * @attr ref android.R.styleable#View_requiresFadingEdge | |
| */ | |
| public boolean isVerticalFadingEdgeEnabled() { | |
| return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; | |
| } | |
| /** | |
| * <p>Define whether the vertical edges should be faded when this view | |
| * is scrolled vertically.</p> | |
| * | |
| * @param verticalFadingEdgeEnabled true if the vertical edges should | |
| * be faded when the view is scrolled | |
| * vertically | |
| * | |
| * @see #isVerticalFadingEdgeEnabled() | |
| * | |
| * @attr ref android.R.styleable#View_requiresFadingEdge | |
| */ | |
| public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { | |
| if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { | |
| if (verticalFadingEdgeEnabled) { | |
| initScrollCache(); | |
| } | |
| mViewFlags ^= FADING_EDGE_VERTICAL; | |
| } | |
| } | |
| /** | |
| * Returns the strength, or intensity, of the top faded edge. The strength is | |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation | |
| * returns 0.0 or 1.0 but no value in between. | |
| * | |
| * Subclasses should override this method to provide a smoother fade transition | |
| * when scrolling occurs. | |
| * | |
| * @return the intensity of the top fade as a float between 0.0f and 1.0f | |
| */ | |
| protected float getTopFadingEdgeStrength() { | |
| return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; | |
| } | |
| /** | |
| * Returns the strength, or intensity, of the bottom faded edge. The strength is | |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation | |
| * returns 0.0 or 1.0 but no value in between. | |
| * | |
| * Subclasses should override this method to provide a smoother fade transition | |
| * when scrolling occurs. | |
| * | |
| * @return the intensity of the bottom fade as a float between 0.0f and 1.0f | |
| */ | |
| protected float getBottomFadingEdgeStrength() { | |
| return computeVerticalScrollOffset() + computeVerticalScrollExtent() < | |
| computeVerticalScrollRange() ? 1.0f : 0.0f; | |
| } | |
| /** | |
| * Returns the strength, or intensity, of the left faded edge. The strength is | |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation | |
| * returns 0.0 or 1.0 but no value in between. | |
| * | |
| * Subclasses should override this method to provide a smoother fade transition | |
| * when scrolling occurs. | |
| * | |
| * @return the intensity of the left fade as a float between 0.0f and 1.0f | |
| */ | |
| protected float getLeftFadingEdgeStrength() { | |
| return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; | |
| } | |
| /** | |
| * Returns the strength, or intensity, of the right faded edge. The strength is | |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation | |
| * returns 0.0 or 1.0 but no value in between. | |
| * | |
| * Subclasses should override this method to provide a smoother fade transition | |
| * when scrolling occurs. | |
| * | |
| * @return the intensity of the right fade as a float between 0.0f and 1.0f | |
| */ | |
| protected float getRightFadingEdgeStrength() { | |
| return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < | |
| computeHorizontalScrollRange() ? 1.0f : 0.0f; | |
| } | |
| /** | |
| * <p>Indicate whether the horizontal scrollbar should be drawn or not. The | |
| * scrollbar is not drawn by default.</p> | |
| * | |
| * @return true if the horizontal scrollbar should be painted, false | |
| * otherwise | |
| * | |
| * @see #setHorizontalScrollBarEnabled(boolean) | |
| */ | |
| public boolean isHorizontalScrollBarEnabled() { | |
| return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; | |
| } | |
| /** | |
| * <p>Define whether the horizontal scrollbar should be drawn or not. The | |
| * scrollbar is not drawn by default.</p> | |
| * | |
| * @param horizontalScrollBarEnabled true if the horizontal scrollbar should | |
| * be painted | |
| * | |
| * @see #isHorizontalScrollBarEnabled() | |
| */ | |
| public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { | |
| if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { | |
| mViewFlags ^= SCROLLBARS_HORIZONTAL; | |
| computeOpaqueFlags(); | |
| resolvePadding(); | |
| } | |
| } | |
| /** | |
| * <p>Indicate whether the vertical scrollbar should be drawn or not. The | |
| * scrollbar is not drawn by default.</p> | |
| * | |
| * @return true if the vertical scrollbar should be painted, false | |
| * otherwise | |
| * | |
| * @see #setVerticalScrollBarEnabled(boolean) | |
| */ | |
| public boolean isVerticalScrollBarEnabled() { | |
| return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; | |
| } | |
| /** | |
| * <p>Define whether the vertical scrollbar should be drawn or not. The | |
| * scrollbar is not drawn by default.</p> | |
| * | |
| * @param verticalScrollBarEnabled true if the vertical scrollbar should | |
| * be painted | |
| * | |
| * @see #isVerticalScrollBarEnabled() | |
| */ | |
| public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { | |
| if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { | |
| mViewFlags ^= SCROLLBARS_VERTICAL; | |
| computeOpaqueFlags(); | |
| resolvePadding(); | |
| } | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected void recomputePadding() { | |
| internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); | |
| } | |
| /** | |
| * Define whether scrollbars will fade when the view is not scrolling. | |
| * | |
| * @param fadeScrollbars whether to enable fading | |
| * | |
| * @attr ref android.R.styleable#View_fadeScrollbars | |
| */ | |
| public void setScrollbarFadingEnabled(boolean fadeScrollbars) { | |
| initScrollCache(); | |
| final ScrollabilityCache scrollabilityCache = mScrollCache; | |
| scrollabilityCache.fadeScrollBars = fadeScrollbars; | |
| if (fadeScrollbars) { | |
| scrollabilityCache.state = ScrollabilityCache.OFF; | |
| } else { | |
| scrollabilityCache.state = ScrollabilityCache.ON; | |
| } | |
| } | |
| /** | |
| * | |
| * Returns true if scrollbars will fade when this view is not scrolling | |
| * | |
| * @return true if scrollbar fading is enabled | |
| * | |
| * @attr ref android.R.styleable#View_fadeScrollbars | |
| */ | |
| public boolean isScrollbarFadingEnabled() { | |
| return mScrollCache != null && mScrollCache.fadeScrollBars; | |
| } | |
| /** | |
| * | |
| * Returns the delay before scrollbars fade. | |
| * | |
| * @return the delay before scrollbars fade | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade | |
| */ | |
| public int getScrollBarDefaultDelayBeforeFade() { | |
| return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : | |
| mScrollCache.scrollBarDefaultDelayBeforeFade; | |
| } | |
| /** | |
| * Define the delay before scrollbars fade. | |
| * | |
| * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade | |
| */ | |
| public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { | |
| getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; | |
| } | |
| /** | |
| * | |
| * Returns the scrollbar fade duration. | |
| * | |
| * @return the scrollbar fade duration | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarFadeDuration | |
| */ | |
| public int getScrollBarFadeDuration() { | |
| return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : | |
| mScrollCache.scrollBarFadeDuration; | |
| } | |
| /** | |
| * Define the scrollbar fade duration. | |
| * | |
| * @param scrollBarFadeDuration - the scrollbar fade duration | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarFadeDuration | |
| */ | |
| public void setScrollBarFadeDuration(int scrollBarFadeDuration) { | |
| getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; | |
| } | |
| /** | |
| * | |
| * Returns the scrollbar size. | |
| * | |
| * @return the scrollbar size | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarSize | |
| */ | |
| public int getScrollBarSize() { | |
| return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : | |
| mScrollCache.scrollBarSize; | |
| } | |
| /** | |
| * Define the scrollbar size. | |
| * | |
| * @param scrollBarSize - the scrollbar size | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarSize | |
| */ | |
| public void setScrollBarSize(int scrollBarSize) { | |
| getScrollCache().scrollBarSize = scrollBarSize; | |
| } | |
| /** | |
| * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or | |
| * inset. When inset, they add to the padding of the view. And the scrollbars | |
| * can be drawn inside the padding area or on the edge of the view. For example, | |
| * if a view has a background drawable and you want to draw the scrollbars | |
| * inside the padding specified by the drawable, you can use | |
| * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to | |
| * appear at the edge of the view, ignoring the padding, then you can use | |
| * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> | |
| * @param style the style of the scrollbars. Should be one of | |
| * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, | |
| * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. | |
| * @see #SCROLLBARS_INSIDE_OVERLAY | |
| * @see #SCROLLBARS_INSIDE_INSET | |
| * @see #SCROLLBARS_OUTSIDE_OVERLAY | |
| * @see #SCROLLBARS_OUTSIDE_INSET | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarStyle | |
| */ | |
| public void setScrollBarStyle(@ScrollBarStyle int style) { | |
| if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { | |
| mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); | |
| computeOpaqueFlags(); | |
| resolvePadding(); | |
| } | |
| } | |
| /** | |
| * <p>Returns the current scrollbar style.</p> | |
| * @return the current scrollbar style | |
| * @see #SCROLLBARS_INSIDE_OVERLAY | |
| * @see #SCROLLBARS_INSIDE_INSET | |
| * @see #SCROLLBARS_OUTSIDE_OVERLAY | |
| * @see #SCROLLBARS_OUTSIDE_INSET | |
| * | |
| * @attr ref android.R.styleable#View_scrollbarStyle | |
| */ | |
| @ViewDebug.ExportedProperty(mapping = { | |
| @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), | |
| @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), | |
| @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), | |
| @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") | |
| }) | |
| @ScrollBarStyle | |
| public int getScrollBarStyle() { | |
| return mViewFlags & SCROLLBARS_STYLE_MASK; | |
| } | |
| /** | |
| * <p>Compute the horizontal range that the horizontal scrollbar | |
| * represents.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeHorizontalScrollExtent()} and | |
| * {@link #computeHorizontalScrollOffset()}.</p> | |
| * | |
| * <p>The default range is the drawing width of this view.</p> | |
| * | |
| * @return the total horizontal range represented by the horizontal | |
| * scrollbar | |
| * | |
| * @see #computeHorizontalScrollExtent() | |
| * @see #computeHorizontalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeHorizontalScrollRange() { | |
| return getWidth(); | |
| } | |
| /** | |
| * <p>Compute the horizontal offset of the horizontal scrollbar's thumb | |
| * within the horizontal range. This value is used to compute the position | |
| * of the thumb within the scrollbar's track.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeHorizontalScrollRange()} and | |
| * {@link #computeHorizontalScrollExtent()}.</p> | |
| * | |
| * <p>The default offset is the scroll offset of this view.</p> | |
| * | |
| * @return the horizontal offset of the scrollbar's thumb | |
| * | |
| * @see #computeHorizontalScrollRange() | |
| * @see #computeHorizontalScrollExtent() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeHorizontalScrollOffset() { | |
| return mScrollX; | |
| } | |
| /** | |
| * <p>Compute the horizontal extent of the horizontal scrollbar's thumb | |
| * within the horizontal range. This value is used to compute the length | |
| * of the thumb within the scrollbar's track.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeHorizontalScrollRange()} and | |
| * {@link #computeHorizontalScrollOffset()}.</p> | |
| * | |
| * <p>The default extent is the drawing width of this view.</p> | |
| * | |
| * @return the horizontal extent of the scrollbar's thumb | |
| * | |
| * @see #computeHorizontalScrollRange() | |
| * @see #computeHorizontalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeHorizontalScrollExtent() { | |
| return getWidth(); | |
| } | |
| /** | |
| * <p>Compute the vertical range that the vertical scrollbar represents.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeVerticalScrollExtent()} and | |
| * {@link #computeVerticalScrollOffset()}.</p> | |
| * | |
| * @return the total vertical range represented by the vertical scrollbar | |
| * | |
| * <p>The default range is the drawing height of this view.</p> | |
| * | |
| * @see #computeVerticalScrollExtent() | |
| * @see #computeVerticalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeVerticalScrollRange() { | |
| return getHeight(); | |
| } | |
| /** | |
| * <p>Compute the vertical offset of the vertical scrollbar's thumb | |
| * within the horizontal range. This value is used to compute the position | |
| * of the thumb within the scrollbar's track.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeVerticalScrollRange()} and | |
| * {@link #computeVerticalScrollExtent()}.</p> | |
| * | |
| * <p>The default offset is the scroll offset of this view.</p> | |
| * | |
| * @return the vertical offset of the scrollbar's thumb | |
| * | |
| * @see #computeVerticalScrollRange() | |
| * @see #computeVerticalScrollExtent() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeVerticalScrollOffset() { | |
| return mScrollY; | |
| } | |
| /** | |
| * <p>Compute the vertical extent of the vertical scrollbar's thumb | |
| * within the vertical range. This value is used to compute the length | |
| * of the thumb within the scrollbar's track.</p> | |
| * | |
| * <p>The range is expressed in arbitrary units that must be the same as the | |
| * units used by {@link #computeVerticalScrollRange()} and | |
| * {@link #computeVerticalScrollOffset()}.</p> | |
| * | |
| * <p>The default extent is the drawing height of this view.</p> | |
| * | |
| * @return the vertical extent of the scrollbar's thumb | |
| * | |
| * @see #computeVerticalScrollRange() | |
| * @see #computeVerticalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| */ | |
| protected int computeVerticalScrollExtent() { | |
| return getHeight(); | |
| } | |
| /** | |
| * Check if this view can be scrolled horizontally in a certain direction. | |
| * | |
| * @param direction Negative to check scrolling left, positive to check scrolling right. | |
| * @return true if this view can be scrolled in the specified direction, false otherwise. | |
| */ | |
| public boolean canScrollHorizontally(int direction) { | |
| final int offset = computeHorizontalScrollOffset(); | |
| final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); | |
| if (range == 0) return false; | |
| if (direction < 0) { | |
| return offset > 0; | |
| } else { | |
| return offset < range - 1; | |
| } | |
| } | |
| /** | |
| * Check if this view can be scrolled vertically in a certain direction. | |
| * | |
| * @param direction Negative to check scrolling up, positive to check scrolling down. | |
| * @return true if this view can be scrolled in the specified direction, false otherwise. | |
| */ | |
| public boolean canScrollVertically(int direction) { | |
| final int offset = computeVerticalScrollOffset(); | |
| final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); | |
| if (range == 0) return false; | |
| if (direction < 0) { | |
| return offset > 0; | |
| } else { | |
| return offset < range - 1; | |
| } | |
| } | |
| void getScrollIndicatorBounds(@NonNull Rect out) { | |
| out.left = mScrollX; | |
| out.right = mScrollX + mRight - mLeft; | |
| out.top = mScrollY; | |
| out.bottom = mScrollY + mBottom - mTop; | |
| } | |
| private void onDrawScrollIndicators(Canvas c) { | |
| if ((mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) == 0) { | |
| // No scroll indicators enabled. | |
| return; | |
| } | |
| final Drawable dr = mScrollIndicatorDrawable; | |
| if (dr == null) { | |
| // Scroll indicators aren't supported here. | |
| return; | |
| } | |
| final int h = dr.getIntrinsicHeight(); | |
| final int w = dr.getIntrinsicWidth(); | |
| final Rect rect = mAttachInfo.mTmpInvalRect; | |
| getScrollIndicatorBounds(rect); | |
| if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_TOP) != 0) { | |
| final boolean canScrollUp = canScrollVertically(-1); | |
| if (canScrollUp) { | |
| dr.setBounds(rect.left, rect.top, rect.right, rect.top + h); | |
| dr.draw(c); | |
| } | |
| } | |
| if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_BOTTOM) != 0) { | |
| final boolean canScrollDown = canScrollVertically(1); | |
| if (canScrollDown) { | |
| dr.setBounds(rect.left, rect.bottom - h, rect.right, rect.bottom); | |
| dr.draw(c); | |
| } | |
| } | |
| final int leftRtl; | |
| final int rightRtl; | |
| if (getLayoutDirection() == LAYOUT_DIRECTION_RTL) { | |
| leftRtl = PFLAG3_SCROLL_INDICATOR_END; | |
| rightRtl = PFLAG3_SCROLL_INDICATOR_START; | |
| } else { | |
| leftRtl = PFLAG3_SCROLL_INDICATOR_START; | |
| rightRtl = PFLAG3_SCROLL_INDICATOR_END; | |
| } | |
| final int leftMask = PFLAG3_SCROLL_INDICATOR_LEFT | leftRtl; | |
| if ((mPrivateFlags3 & leftMask) != 0) { | |
| final boolean canScrollLeft = canScrollHorizontally(-1); | |
| if (canScrollLeft) { | |
| dr.setBounds(rect.left, rect.top, rect.left + w, rect.bottom); | |
| dr.draw(c); | |
| } | |
| } | |
| final int rightMask = PFLAG3_SCROLL_INDICATOR_RIGHT | rightRtl; | |
| if ((mPrivateFlags3 & rightMask) != 0) { | |
| final boolean canScrollRight = canScrollHorizontally(1); | |
| if (canScrollRight) { | |
| dr.setBounds(rect.right - w, rect.top, rect.right, rect.bottom); | |
| dr.draw(c); | |
| } | |
| } | |
| } | |
| /** | |
| * <p>Request the drawing of the horizontal and the vertical scrollbar. The | |
| * scrollbars are painted only if they have been awakened first.</p> | |
| * | |
| * @param canvas the canvas on which to draw the scrollbars | |
| * | |
| * @see #awakenScrollBars(int) | |
| */ | |
| protected final void onDrawScrollBars(Canvas canvas) { | |
| // scrollbars are drawn only when the animation is running | |
| final ScrollabilityCache cache = mScrollCache; | |
| if (cache != null) { | |
| int state = cache.state; | |
| if (state == ScrollabilityCache.OFF) { | |
| return; | |
| } | |
| boolean invalidate = false; | |
| if (state == ScrollabilityCache.FADING) { | |
| // We're fading -- get our fade interpolation | |
| if (cache.interpolatorValues == null) { | |
| cache.interpolatorValues = new float[1]; | |
| } | |
| float[] values = cache.interpolatorValues; | |
| // Stops the animation if we're done | |
| if (cache.scrollBarInterpolator.timeToValues(values) == | |
| Interpolator.Result.FREEZE_END) { | |
| cache.state = ScrollabilityCache.OFF; | |
| } else { | |
| cache.scrollBar.mutate().setAlpha(Math.round(values[0])); | |
| } | |
| // This will make the scroll bars inval themselves after | |
| // drawing. We only want this when we're fading so that | |
| // we prevent excessive redraws | |
| invalidate = true; | |
| } else { | |
| // We're just on -- but we may have been fading before so | |
| // reset alpha | |
| cache.scrollBar.mutate().setAlpha(255); | |
| } | |
| final int viewFlags = mViewFlags; | |
| final boolean drawHorizontalScrollBar = | |
| (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; | |
| final boolean drawVerticalScrollBar = | |
| (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL | |
| && !isVerticalScrollBarHidden(); | |
| if (drawVerticalScrollBar || drawHorizontalScrollBar) { | |
| final int width = mRight - mLeft; | |
| final int height = mBottom - mTop; | |
| final ScrollBarDrawable scrollBar = cache.scrollBar; | |
| final int scrollX = mScrollX; | |
| final int scrollY = mScrollY; | |
| final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; | |
| int left; | |
| int top; | |
| int right; | |
| int bottom; | |
| if (drawHorizontalScrollBar) { | |
| int size = scrollBar.getSize(false); | |
| if (size <= 0) { | |
| size = cache.scrollBarSize; | |
| } | |
| scrollBar.setParameters(computeHorizontalScrollRange(), | |
| computeHorizontalScrollOffset(), | |
| computeHorizontalScrollExtent(), false); | |
| final int verticalScrollBarGap = drawVerticalScrollBar ? | |
| getVerticalScrollbarWidth() : 0; | |
| top = scrollY + height - size - (mUserPaddingBottom & inside); | |
| left = scrollX + (mPaddingLeft & inside); | |
| right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; | |
| bottom = top + size; | |
| onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); | |
| if (invalidate) { | |
| invalidate(left, top, right, bottom); | |
| } | |
| } | |
| if (drawVerticalScrollBar) { | |
| int size = scrollBar.getSize(true); | |
| if (size <= 0) { | |
| size = cache.scrollBarSize; | |
| } | |
| scrollBar.setParameters(computeVerticalScrollRange(), | |
| computeVerticalScrollOffset(), | |
| computeVerticalScrollExtent(), true); | |
| int verticalScrollbarPosition = mVerticalScrollbarPosition; | |
| if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { | |
| verticalScrollbarPosition = isLayoutRtl() ? | |
| SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; | |
| } | |
| switch (verticalScrollbarPosition) { | |
| default: | |
| case SCROLLBAR_POSITION_RIGHT: | |
| left = scrollX + width - size - (mUserPaddingRight & inside); | |
| break; | |
| case SCROLLBAR_POSITION_LEFT: | |
| left = scrollX + (mUserPaddingLeft & inside); | |
| break; | |
| } | |
| top = scrollY + (mPaddingTop & inside); | |
| right = left + size; | |
| bottom = scrollY + height - (mUserPaddingBottom & inside); | |
| onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); | |
| if (invalidate) { | |
| invalidate(left, top, right, bottom); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Override this if the vertical scrollbar needs to be hidden in a subclass, like when | |
| * FastScroller is visible. | |
| * @return whether to temporarily hide the vertical scrollbar | |
| * @hide | |
| */ | |
| protected boolean isVerticalScrollBarHidden() { | |
| return false; | |
| } | |
| /** | |
| * <p>Draw the horizontal scrollbar if | |
| * {@link #isHorizontalScrollBarEnabled()} returns true.</p> | |
| * | |
| * @param canvas the canvas on which to draw the scrollbar | |
| * @param scrollBar the scrollbar's drawable | |
| * | |
| * @see #isHorizontalScrollBarEnabled() | |
| * @see #computeHorizontalScrollRange() | |
| * @see #computeHorizontalScrollExtent() | |
| * @see #computeHorizontalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| * @hide | |
| */ | |
| protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, | |
| int l, int t, int r, int b) { | |
| scrollBar.setBounds(l, t, r, b); | |
| scrollBar.draw(canvas); | |
| } | |
| /** | |
| * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} | |
| * returns true.</p> | |
| * | |
| * @param canvas the canvas on which to draw the scrollbar | |
| * @param scrollBar the scrollbar's drawable | |
| * | |
| * @see #isVerticalScrollBarEnabled() | |
| * @see #computeVerticalScrollRange() | |
| * @see #computeVerticalScrollExtent() | |
| * @see #computeVerticalScrollOffset() | |
| * @see android.widget.ScrollBarDrawable | |
| * @hide | |
| */ | |
| protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, | |
| int l, int t, int r, int b) { | |
| scrollBar.setBounds(l, t, r, b); | |
| scrollBar.draw(canvas); | |
| } | |
| /** | |
| * Implement this to do your drawing. | |
| * | |
| * @param canvas the canvas on which the background will be drawn | |
| */ | |
| protected void onDraw(Canvas canvas) { | |
| } | |
| /* | |
| * Caller is responsible for calling requestLayout if necessary. | |
| * (This allows addViewInLayout to not request a new layout.) | |
| */ | |
| void assignParent(ViewParent parent) { | |
| if (mParent == null) { | |
| mParent = parent; | |
| } else if (parent == null) { | |
| mParent = null; | |
| } else { | |
| throw new RuntimeException("view " + this + " being added, but" | |
| + " it already has a parent"); | |
| } | |
| } | |
| /** | |
| * This is called when the view is attached to a window. At this point it | |
| * has a Surface and will start drawing. Note that this function is | |
| * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, | |
| * however it may be called any time before the first onDraw -- including | |
| * before or after {@link #onMeasure(int, int)}. | |
| * | |
| * @see #onDetachedFromWindow() | |
| */ | |
| @CallSuper | |
| protected void onAttachedToWindow() { | |
| if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { | |
| mParent.requestTransparentRegion(this); | |
| } | |
| mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; | |
| jumpDrawablesToCurrentState(); | |
| resetSubtreeAccessibilityStateChanged(); | |
| // rebuild, since Outline not maintained while View is detached | |
| rebuildOutline(); | |
| if (isFocused()) { | |
| InputMethodManager imm = InputMethodManager.peekInstance(); | |
| if (imm != null) { | |
| imm.focusIn(this); | |
| } | |
| } | |
| } | |
| /** | |
| * Resolve all RTL related properties. | |
| * | |
| * @return true if resolution of RTL properties has been done | |
| * | |
| * @hide | |
| */ | |
| public boolean resolveRtlPropertiesIfNeeded() { | |
| if (!needRtlPropertiesResolution()) return false; | |
| // Order is important here: LayoutDirection MUST be resolved first | |
| if (!isLayoutDirectionResolved()) { | |
| resolveLayoutDirection(); | |
| resolveLayoutParams(); | |
| } | |
| // ... then we can resolve the others properties depending on the resolved LayoutDirection. | |
| if (!isTextDirectionResolved()) { | |
| resolveTextDirection(); | |
| } | |
| if (!isTextAlignmentResolved()) { | |
| resolveTextAlignment(); | |
| } | |
| // Should resolve Drawables before Padding because we need the layout direction of the | |
| // Drawable to correctly resolve Padding. | |
| if (!areDrawablesResolved()) { | |
| resolveDrawables(); | |
| } | |
| if (!isPaddingResolved()) { | |
| resolvePadding(); | |
| } | |
| onRtlPropertiesChanged(getLayoutDirection()); | |
| return true; | |
| } | |
| /** | |
| * Reset resolution of all RTL related properties. | |
| * | |
| * @hide | |
| */ | |
| public void resetRtlProperties() { | |
| resetResolvedLayoutDirection(); | |
| resetResolvedTextDirection(); | |
| resetResolvedTextAlignment(); | |
| resetResolvedPadding(); | |
| resetResolvedDrawables(); | |
| } | |
| /** | |
| * @see #onScreenStateChanged(int) | |
| */ | |
| void dispatchScreenStateChanged(int screenState) { | |
| onScreenStateChanged(screenState); | |
| } | |
| /** | |
| * This method is called whenever the state of the screen this view is | |
| * attached to changes. A state change will usually occurs when the screen | |
| * turns on or off (whether it happens automatically or the user does it | |
| * manually.) | |
| * | |
| * @param screenState The new state of the screen. Can be either | |
| * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} | |
| */ | |
| public void onScreenStateChanged(int screenState) { | |
| } | |
| /** | |
| * Return true if the application tag in the AndroidManifest has set "supportRtl" to true | |
| */ | |
| private boolean hasRtlSupport() { | |
| return mContext.getApplicationInfo().hasRtlSupport(); | |
| } | |
| /** | |
| * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or | |
| * RTL not supported) | |
| */ | |
| private boolean isRtlCompatibilityMode() { | |
| final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; | |
| return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); | |
| } | |
| /** | |
| * @return true if RTL properties need resolution. | |
| * | |
| */ | |
| private boolean needRtlPropertiesResolution() { | |
| return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; | |
| } | |
| /** | |
| * Called when any RTL property (layout direction or text direction or text alignment) has | |
| * been changed. | |
| * | |
| * Subclasses need to override this method to take care of cached information that depends on the | |
| * resolved layout direction, or to inform child views that inherit their layout direction. | |
| * | |
| * The default implementation does nothing. | |
| * | |
| * @param layoutDirection the direction of the layout | |
| * | |
| * @see #LAYOUT_DIRECTION_LTR | |
| * @see #LAYOUT_DIRECTION_RTL | |
| */ | |
| public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { | |
| } | |
| /** | |
| * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing | |
| * that the parent directionality can and will be resolved before its children. | |
| * | |
| * @return true if resolution has been done, false otherwise. | |
| * | |
| * @hide | |
| */ | |
| public boolean resolveLayoutDirection() { | |
| // Clear any previous layout direction resolution | |
| mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; | |
| if (hasRtlSupport()) { | |
| // Set resolved depending on layout direction | |
| switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> | |
| PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { | |
| case LAYOUT_DIRECTION_INHERIT: | |
| // We cannot resolve yet. LTR is by default and let the resolution happen again | |
| // later to get the correct resolved value | |
| if (!canResolveLayoutDirection()) return false; | |
| // Parent has not yet resolved, LTR is still the default | |
| try { | |
| if (!mParent.isLayoutDirectionResolved()) return false; | |
| if (mParent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { | |
| mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; | |
| } | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| break; | |
| case LAYOUT_DIRECTION_RTL: | |
| mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; | |
| break; | |
| case LAYOUT_DIRECTION_LOCALE: | |
| if((LAYOUT_DIRECTION_RTL == | |
| TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { | |
| mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; | |
| } | |
| break; | |
| default: | |
| // Nothing to do, LTR by default | |
| } | |
| } | |
| // Set to resolved | |
| mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; | |
| return true; | |
| } | |
| /** | |
| * Check if layout direction resolution can be done. | |
| * | |
| * @return true if layout direction resolution can be done otherwise return false. | |
| */ | |
| public boolean canResolveLayoutDirection() { | |
| switch (getRawLayoutDirection()) { | |
| case LAYOUT_DIRECTION_INHERIT: | |
| if (mParent != null) { | |
| try { | |
| return mParent.canResolveLayoutDirection(); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| } | |
| return false; | |
| default: | |
| return true; | |
| } | |
| } | |
| /** | |
| * Reset the resolved layout direction. Layout direction will be resolved during a call to | |
| * {@link #onMeasure(int, int)}. | |
| * | |
| * @hide | |
| */ | |
| public void resetResolvedLayoutDirection() { | |
| // Reset the current resolved bits | |
| mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; | |
| } | |
| /** | |
| * @return true if the layout direction is inherited. | |
| * | |
| * @hide | |
| */ | |
| public boolean isLayoutDirectionInherited() { | |
| return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); | |
| } | |
| /** | |
| * @return true if layout direction has been resolved. | |
| */ | |
| public boolean isLayoutDirectionResolved() { | |
| return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; | |
| } | |
| /** | |
| * Return if padding has been resolved | |
| * | |
| * @hide | |
| */ | |
| boolean isPaddingResolved() { | |
| return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; | |
| } | |
| /** | |
| * Resolves padding depending on layout direction, if applicable, and | |
| * recomputes internal padding values to adjust for scroll bars. | |
| * | |
| * @hide | |
| */ | |
| public void resolvePadding() { | |
| final int resolvedLayoutDirection = getLayoutDirection(); | |
| if (!isRtlCompatibilityMode()) { | |
| // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. | |
| // If start / end padding are defined, they will be resolved (hence overriding) to | |
| // left / right or right / left depending on the resolved layout direction. | |
| // If start / end padding are not defined, use the left / right ones. | |
| if (mBackground != null && (!mLeftPaddingDefined || !mRightPaddingDefined)) { | |
| Rect padding = sThreadLocal.get(); | |
| if (padding == null) { | |
| padding = new Rect(); | |
| sThreadLocal.set(padding); | |
| } | |
| mBackground.getPadding(padding); | |
| if (!mLeftPaddingDefined) { | |
| mUserPaddingLeftInitial = padding.left; | |
| } | |
| if (!mRightPaddingDefined) { | |
| mUserPaddingRightInitial = padding.right; | |
| } | |
| } | |
| switch (resolvedLayoutDirection) { | |
| case LAYOUT_DIRECTION_RTL: | |
| if (mUserPaddingStart != UNDEFINED_PADDING) { | |
| mUserPaddingRight = mUserPaddingStart; | |
| } else { | |
| mUserPaddingRight = mUserPaddingRightInitial; | |
| } | |
| if (mUserPaddingEnd != UNDEFINED_PADDING) { | |
| mUserPaddingLeft = mUserPaddingEnd; | |
| } else { | |
| mUserPaddingLeft = mUserPaddingLeftInitial; | |
| } | |
| break; | |
| case LAYOUT_DIRECTION_LTR: | |
| default: | |
| if (mUserPaddingStart != UNDEFINED_PADDING) { | |
| mUserPaddingLeft = mUserPaddingStart; | |
| } else { | |
| mUserPaddingLeft = mUserPaddingLeftInitial; | |
| } | |
| if (mUserPaddingEnd != UNDEFINED_PADDING) { | |
| mUserPaddingRight = mUserPaddingEnd; | |
| } else { | |
| mUserPaddingRight = mUserPaddingRightInitial; | |
| } | |
| } | |
| mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; | |
| } | |
| internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); | |
| onRtlPropertiesChanged(resolvedLayoutDirection); | |
| mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; | |
| } | |
| /** | |
| * Reset the resolved layout direction. | |
| * | |
| * @hide | |
| */ | |
| public void resetResolvedPadding() { | |
| resetResolvedPaddingInternal(); | |
| } | |
| /** | |
| * Used when we only want to reset *this* view's padding and not trigger overrides | |
| * in ViewGroup that reset children too. | |
| */ | |
| void resetResolvedPaddingInternal() { | |
| mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; | |
| } | |
| /** | |
| * This is called when the view is detached from a window. At this point it | |
| * no longer has a surface for drawing. | |
| * | |
| * @see #onAttachedToWindow() | |
| */ | |
| @CallSuper | |
| protected void onDetachedFromWindow() { | |
| } | |
| /** | |
| * This is a framework-internal mirror of onDetachedFromWindow() that's called | |
| * after onDetachedFromWindow(). | |
| * | |
| * If you override this you *MUST* call super.onDetachedFromWindowInternal()! | |
| * The super method should be called at the end of the overridden method to ensure | |
| * subclasses are destroyed first | |
| * | |
| * @hide | |
| */ | |
| @CallSuper | |
| protected void onDetachedFromWindowInternal() { | |
| mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; | |
| mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; | |
| removeUnsetPressCallback(); | |
| removeLongPressCallback(); | |
| removePerformClickCallback(); | |
| removeSendViewScrolledAccessibilityEventCallback(); | |
| stopNestedScroll(); | |
| // Anything that started animating right before detach should already | |
| // be in its final state when re-attached. | |
| jumpDrawablesToCurrentState(); | |
| destroyDrawingCache(); | |
| cleanupDraw(); | |
| mCurrentAnimation = null; | |
| } | |
| private void cleanupDraw() { | |
| resetDisplayList(); | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mViewRootImpl.cancelInvalidate(this); | |
| } | |
| } | |
| void invalidateInheritedLayoutMode(int layoutModeOfRoot) { | |
| } | |
| /** | |
| * @return The number of times this view has been attached to a window | |
| */ | |
| protected int getWindowAttachCount() { | |
| return mWindowAttachCount; | |
| } | |
| /** | |
| * Retrieve a unique token identifying the window this view is attached to. | |
| * @return Return the window's token for use in | |
| * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. | |
| */ | |
| public IBinder getWindowToken() { | |
| return mAttachInfo != null ? mAttachInfo.mWindowToken : null; | |
| } | |
| /** | |
| * Retrieve the {@link WindowId} for the window this view is | |
| * currently attached to. | |
| */ | |
| public WindowId getWindowId() { | |
| if (mAttachInfo == null) { | |
| return null; | |
| } | |
| if (mAttachInfo.mWindowId == null) { | |
| try { | |
| mAttachInfo.mIWindowId = mAttachInfo.mSession.getWindowId( | |
| mAttachInfo.mWindowToken); | |
| mAttachInfo.mWindowId = new WindowId( | |
| mAttachInfo.mIWindowId); | |
| } catch (RemoteException e) { | |
| } | |
| } | |
| return mAttachInfo.mWindowId; | |
| } | |
| /** | |
| * Retrieve a unique token identifying the top-level "real" window of | |
| * the window that this view is attached to. That is, this is like | |
| * {@link #getWindowToken}, except if the window this view in is a panel | |
| * window (attached to another containing window), then the token of | |
| * the containing window is returned instead. | |
| * | |
| * @return Returns the associated window token, either | |
| * {@link #getWindowToken()} or the containing window's token. | |
| */ | |
| public IBinder getApplicationWindowToken() { | |
| AttachInfo ai = mAttachInfo; | |
| if (ai != null) { | |
| IBinder appWindowToken = ai.mPanelParentWindowToken; | |
| if (appWindowToken == null) { | |
| appWindowToken = ai.mWindowToken; | |
| } | |
| return appWindowToken; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Gets the logical display to which the view's window has been attached. | |
| * | |
| * @return The logical display, or null if the view is not currently attached to a window. | |
| */ | |
| public Display getDisplay() { | |
| return mAttachInfo != null ? mAttachInfo.mDisplay : null; | |
| } | |
| /** | |
| * Retrieve private session object this view hierarchy is using to | |
| * communicate with the window manager. | |
| * @return the session object to communicate with the window manager | |
| */ | |
| /*package*/ IWindowSession getWindowSession() { | |
| return mAttachInfo != null ? mAttachInfo.mSession : null; | |
| } | |
| /** | |
| * Return the visibility value of the least visible component passed. | |
| */ | |
| int combineVisibility(int vis1, int vis2) { | |
| // This works because VISIBLE < INVISIBLE < GONE. | |
| return Math.max(vis1, vis2); | |
| } | |
| /** | |
| * @param info the {@link android.view.View.AttachInfo} to associated with | |
| * this view | |
| */ | |
| void dispatchAttachedToWindow(AttachInfo info, int visibility) { | |
| //System.out.println("Attached! " + this); | |
| mAttachInfo = info; | |
| if (mOverlay != null) { | |
| mOverlay.getOverlayView().dispatchAttachedToWindow(info, visibility); | |
| } | |
| mWindowAttachCount++; | |
| // We will need to evaluate the drawable state at least once. | |
| mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; | |
| if (mFloatingTreeObserver != null) { | |
| info.mTreeObserver.merge(mFloatingTreeObserver); | |
| mFloatingTreeObserver = null; | |
| } | |
| if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { | |
| mAttachInfo.mScrollContainers.add(this); | |
| mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; | |
| } | |
| performCollectViewAttributes(mAttachInfo, visibility); | |
| onAttachedToWindow(); | |
| ListenerInfo li = mListenerInfo; | |
| final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = | |
| li != null ? li.mOnAttachStateChangeListeners : null; | |
| if (listeners != null && listeners.size() > 0) { | |
| // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to | |
| // perform the dispatching. The iterator is a safe guard against listeners that | |
| // could mutate the list by calling the various add/remove methods. This prevents | |
| // the array from being modified while we iterate it. | |
| for (OnAttachStateChangeListener listener : listeners) { | |
| listener.onViewAttachedToWindow(this); | |
| } | |
| } | |
| int vis = info.mWindowVisibility; | |
| if (vis != GONE) { | |
| onWindowVisibilityChanged(vis); | |
| } | |
| // Send onVisibilityChanged directly instead of dispatchVisibilityChanged. | |
| // As all views in the subtree will already receive dispatchAttachedToWindow | |
| // traversing the subtree again here is not desired. | |
| onVisibilityChanged(this, visibility); | |
| if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { | |
| // If nobody has evaluated the drawable state yet, then do it now. | |
| refreshDrawableState(); | |
| } | |
| needGlobalAttributesUpdate(false); | |
| } | |
| void dispatchDetachedFromWindow() { | |
| AttachInfo info = mAttachInfo; | |
| if (info != null) { | |
| int vis = info.mWindowVisibility; | |
| if (vis != GONE) { | |
| onWindowVisibilityChanged(GONE); | |
| } | |
| } | |
| onDetachedFromWindow(); | |
| onDetachedFromWindowInternal(); | |
| InputMethodManager imm = InputMethodManager.peekInstance(); | |
| if (imm != null) { | |
| imm.onViewDetachedFromWindow(this); | |
| } | |
| ListenerInfo li = mListenerInfo; | |
| final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = | |
| li != null ? li.mOnAttachStateChangeListeners : null; | |
| if (listeners != null && listeners.size() > 0) { | |
| // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to | |
| // perform the dispatching. The iterator is a safe guard against listeners that | |
| // could mutate the list by calling the various add/remove methods. This prevents | |
| // the array from being modified while we iterate it. | |
| for (OnAttachStateChangeListener listener : listeners) { | |
| listener.onViewDetachedFromWindow(this); | |
| } | |
| } | |
| if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { | |
| mAttachInfo.mScrollContainers.remove(this); | |
| mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; | |
| } | |
| mAttachInfo = null; | |
| if (mOverlay != null) { | |
| mOverlay.getOverlayView().dispatchDetachedFromWindow(); | |
| } | |
| } | |
| /** | |
| * Cancel any deferred high-level input events that were previously posted to the event queue. | |
| * | |
| * <p>Many views post high-level events such as click handlers to the event queue | |
| * to run deferred in order to preserve a desired user experience - clearing visible | |
| * pressed states before executing, etc. This method will abort any events of this nature | |
| * that are currently in flight.</p> | |
| * | |
| * <p>Custom views that generate their own high-level deferred input events should override | |
| * {@link #onCancelPendingInputEvents()} and remove those pending events from the queue.</p> | |
| * | |
| * <p>This will also cancel pending input events for any child views.</p> | |
| * | |
| * <p>Note that this may not be sufficient as a debouncing strategy for clicks in all cases. | |
| * This will not impact newer events posted after this call that may occur as a result of | |
| * lower-level input events still waiting in the queue. If you are trying to prevent | |
| * double-submitted events for the duration of some sort of asynchronous transaction | |
| * you should also take other steps to protect against unexpected double inputs e.g. calling | |
| * {@link #setEnabled(boolean) setEnabled(false)} and re-enabling the view when | |
| * the transaction completes, tracking already submitted transaction IDs, etc.</p> | |
| */ | |
| public final void cancelPendingInputEvents() { | |
| dispatchCancelPendingInputEvents(); | |
| } | |
| /** | |
| * Called by {@link #cancelPendingInputEvents()} to cancel input events in flight. | |
| * Overridden by ViewGroup to dispatch. Package scoped to prevent app-side meddling. | |
| */ | |
| void dispatchCancelPendingInputEvents() { | |
| mPrivateFlags3 &= ~PFLAG3_CALLED_SUPER; | |
| onCancelPendingInputEvents(); | |
| if ((mPrivateFlags3 & PFLAG3_CALLED_SUPER) != PFLAG3_CALLED_SUPER) { | |
| throw new SuperNotCalledException("View " + getClass().getSimpleName() + | |
| " did not call through to super.onCancelPendingInputEvents()"); | |
| } | |
| } | |
| /** | |
| * Called as the result of a call to {@link #cancelPendingInputEvents()} on this view or | |
| * a parent view. | |
| * | |
| * <p>This method is responsible for removing any pending high-level input events that were | |
| * posted to the event queue to run later. Custom view classes that post their own deferred | |
| * high-level events via {@link #post(Runnable)}, {@link #postDelayed(Runnable, long)} or | |
| * {@link android.os.Handler} should override this method, call | |
| * <code>super.onCancelPendingInputEvents()</code> and remove those callbacks as appropriate. | |
| * </p> | |
| */ | |
| public void onCancelPendingInputEvents() { | |
| removePerformClickCallback(); | |
| cancelLongPress(); | |
| mPrivateFlags3 |= PFLAG3_CALLED_SUPER; | |
| } | |
| /** | |
| * Store this view hierarchy's frozen state into the given container. | |
| * | |
| * @param container The SparseArray in which to save the view's state. | |
| * | |
| * @see #restoreHierarchyState(android.util.SparseArray) | |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) | |
| * @see #onSaveInstanceState() | |
| */ | |
| public void saveHierarchyState(SparseArray<Parcelable> container) { | |
| dispatchSaveInstanceState(container); | |
| } | |
| /** | |
| * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for | |
| * this view and its children. May be overridden to modify how freezing happens to a | |
| * view's children; for example, some views may want to not store state for their children. | |
| * | |
| * @param container The SparseArray in which to save the view's state. | |
| * | |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) | |
| * @see #saveHierarchyState(android.util.SparseArray) | |
| * @see #onSaveInstanceState() | |
| */ | |
| protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { | |
| if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { | |
| mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; | |
| Parcelable state = onSaveInstanceState(); | |
| if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { | |
| throw new IllegalStateException( | |
| "Derived class did not call super.onSaveInstanceState()"); | |
| } | |
| if (state != null) { | |
| // Log.i("View", "Freezing #" + Integer.toHexString(mID) | |
| // + ": " + state); | |
| container.put(mID, state); | |
| } | |
| } | |
| } | |
| /** | |
| * Hook allowing a view to generate a representation of its internal state | |
| * that can later be used to create a new instance with that same state. | |
| * This state should only contain information that is not persistent or can | |
| * not be reconstructed later. For example, you will never store your | |
| * current position on screen because that will be computed again when a | |
| * new instance of the view is placed in its view hierarchy. | |
| * <p> | |
| * Some examples of things you may store here: the current cursor position | |
| * in a text view (but usually not the text itself since that is stored in a | |
| * content provider or other persistent storage), the currently selected | |
| * item in a list view. | |
| * | |
| * @return Returns a Parcelable object containing the view's current dynamic | |
| * state, or null if there is nothing interesting to save. The | |
| * default implementation returns null. | |
| * @see #onRestoreInstanceState(android.os.Parcelable) | |
| * @see #saveHierarchyState(android.util.SparseArray) | |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) | |
| * @see #setSaveEnabled(boolean) | |
| */ | |
| @CallSuper | |
| protected Parcelable onSaveInstanceState() { | |
| mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; | |
| if (mStartActivityRequestWho != null) { | |
| BaseSavedState state = new BaseSavedState(AbsSavedState.EMPTY_STATE); | |
| state.mStartActivityRequestWhoSaved = mStartActivityRequestWho; | |
| return state; | |
| } | |
| return BaseSavedState.EMPTY_STATE; | |
| } | |
| /** | |
| * Restore this view hierarchy's frozen state from the given container. | |
| * | |
| * @param container The SparseArray which holds previously frozen states. | |
| * | |
| * @see #saveHierarchyState(android.util.SparseArray) | |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) | |
| * @see #onRestoreInstanceState(android.os.Parcelable) | |
| */ | |
| public void restoreHierarchyState(SparseArray<Parcelable> container) { | |
| dispatchRestoreInstanceState(container); | |
| } | |
| /** | |
| * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the | |
| * state for this view and its children. May be overridden to modify how restoring | |
| * happens to a view's children; for example, some views may want to not store state | |
| * for their children. | |
| * | |
| * @param container The SparseArray which holds previously saved state. | |
| * | |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) | |
| * @see #restoreHierarchyState(android.util.SparseArray) | |
| * @see #onRestoreInstanceState(android.os.Parcelable) | |
| */ | |
| protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { | |
| if (mID != NO_ID) { | |
| Parcelable state = container.get(mID); | |
| if (state != null) { | |
| // Log.i("View", "Restoreing #" + Integer.toHexString(mID) | |
| // + ": " + state); | |
| mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; | |
| onRestoreInstanceState(state); | |
| if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { | |
| throw new IllegalStateException( | |
| "Derived class did not call super.onRestoreInstanceState()"); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Hook allowing a view to re-apply a representation of its internal state that had previously | |
| * been generated by {@link #onSaveInstanceState}. This function will never be called with a | |
| * null state. | |
| * | |
| * @param state The frozen state that had previously been returned by | |
| * {@link #onSaveInstanceState}. | |
| * | |
| * @see #onSaveInstanceState() | |
| * @see #restoreHierarchyState(android.util.SparseArray) | |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) | |
| */ | |
| @CallSuper | |
| protected void onRestoreInstanceState(Parcelable state) { | |
| mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; | |
| if (state != null && !(state instanceof AbsSavedState)) { | |
| throw new IllegalArgumentException("Wrong state class, expecting View State but " | |
| + "received " + state.getClass().toString() + " instead. This usually happens " | |
| + "when two views of different type have the same id in the same hierarchy. " | |
| + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " | |
| + "other views do not use the same id."); | |
| } | |
| if (state != null && state instanceof BaseSavedState) { | |
| mStartActivityRequestWho = ((BaseSavedState) state).mStartActivityRequestWhoSaved; | |
| } | |
| } | |
| /** | |
| * <p>Return the time at which the drawing of the view hierarchy started.</p> | |
| * | |
| * @return the drawing start time in milliseconds | |
| */ | |
| public long getDrawingTime() { | |
| return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; | |
| } | |
| /** | |
| * <p>Enables or disables the duplication of the parent's state into this view. When | |
| * duplication is enabled, this view gets its drawable state from its parent rather | |
| * than from its own internal properties.</p> | |
| * | |
| * <p>Note: in the current implementation, setting this property to true after the | |
| * view was added to a ViewGroup might have no effect at all. This property should | |
| * always be used from XML or set to true before adding this view to a ViewGroup.</p> | |
| * | |
| * <p>Note: if this view's parent addStateFromChildren property is enabled and this | |
| * property is enabled, an exception will be thrown.</p> | |
| * | |
| * <p>Note: if the child view uses and updates additional states which are unknown to the | |
| * parent, these states should not be affected by this method.</p> | |
| * | |
| * @param enabled True to enable duplication of the parent's drawable state, false | |
| * to disable it. | |
| * | |
| * @see #getDrawableState() | |
| * @see #isDuplicateParentStateEnabled() | |
| */ | |
| public void setDuplicateParentStateEnabled(boolean enabled) { | |
| setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); | |
| } | |
| /** | |
| * <p>Indicates whether this duplicates its drawable state from its parent.</p> | |
| * | |
| * @return True if this view's drawable state is duplicated from the parent, | |
| * false otherwise | |
| * | |
| * @see #getDrawableState() | |
| * @see #setDuplicateParentStateEnabled(boolean) | |
| */ | |
| public boolean isDuplicateParentStateEnabled() { | |
| return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; | |
| } | |
| /** | |
| * <p>Specifies the type of layer backing this view. The layer can be | |
| * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or | |
| * {@link #LAYER_TYPE_HARDWARE}.</p> | |
| * | |
| * <p>A layer is associated with an optional {@link android.graphics.Paint} | |
| * instance that controls how the layer is composed on screen. The following | |
| * properties of the paint are taken into account when composing the layer:</p> | |
| * <ul> | |
| * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> | |
| * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> | |
| * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> | |
| * </ul> | |
| * | |
| * <p>If this view has an alpha value set to < 1.0 by calling | |
| * {@link #setAlpha(float)}, the alpha value of the layer's paint is superseded | |
| * by this view's alpha value.</p> | |
| * | |
| * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE}, | |
| * {@link #LAYER_TYPE_SOFTWARE} and {@link #LAYER_TYPE_HARDWARE} | |
| * for more information on when and how to use layers.</p> | |
| * | |
| * @param layerType The type of layer to use with this view, must be one of | |
| * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or | |
| * {@link #LAYER_TYPE_HARDWARE} | |
| * @param paint The paint used to compose the layer. This argument is optional | |
| * and can be null. It is ignored when the layer type is | |
| * {@link #LAYER_TYPE_NONE} | |
| * | |
| * @see #getLayerType() | |
| * @see #LAYER_TYPE_NONE | |
| * @see #LAYER_TYPE_SOFTWARE | |
| * @see #LAYER_TYPE_HARDWARE | |
| * @see #setAlpha(float) | |
| * | |
| * @attr ref android.R.styleable#View_layerType | |
| */ | |
| public void setLayerType(int layerType, Paint paint) { | |
| if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { | |
| throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " | |
| + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); | |
| } | |
| boolean typeChanged = mRenderNode.setLayerType(layerType); | |
| if (!typeChanged) { | |
| setLayerPaint(paint); | |
| return; | |
| } | |
| // Destroy any previous software drawing cache if needed | |
| if (mLayerType == LAYER_TYPE_SOFTWARE) { | |
| destroyDrawingCache(); | |
| } | |
| mLayerType = layerType; | |
| final boolean layerDisabled = (mLayerType == LAYER_TYPE_NONE); | |
| mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); | |
| mRenderNode.setLayerPaint(mLayerPaint); | |
| // draw() behaves differently if we are on a layer, so we need to | |
| // invalidate() here | |
| invalidateParentCaches(); | |
| invalidate(true); | |
| } | |
| /** | |
| * Updates the {@link Paint} object used with the current layer (used only if the current | |
| * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint | |
| * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time | |
| * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to | |
| * ensure that the view gets redrawn immediately. | |
| * | |
| * <p>A layer is associated with an optional {@link android.graphics.Paint} | |
| * instance that controls how the layer is composed on screen. The following | |
| * properties of the paint are taken into account when composing the layer:</p> | |
| * <ul> | |
| * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> | |
| * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> | |
| * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> | |
| * </ul> | |
| * | |
| * <p>If this view has an alpha value set to < 1.0 by calling {@link #setAlpha(float)}, the | |
| * alpha value of the layer's paint is superseded by this view's alpha value.</p> | |
| * | |
| * @param paint The paint used to compose the layer. This argument is optional | |
| * and can be null. It is ignored when the layer type is | |
| * {@link #LAYER_TYPE_NONE} | |
| * | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| */ | |
| public void setLayerPaint(Paint paint) { | |
| int layerType = getLayerType(); | |
| if (layerType != LAYER_TYPE_NONE) { | |
| mLayerPaint = paint == null ? new Paint() : paint; | |
| if (layerType == LAYER_TYPE_HARDWARE) { | |
| if (mRenderNode.setLayerPaint(mLayerPaint)) { | |
| invalidateViewProperty(false, false); | |
| } | |
| } else { | |
| invalidate(); | |
| } | |
| } | |
| } | |
| /** | |
| * Indicates what type of layer is currently associated with this view. By default | |
| * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. | |
| * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} | |
| * for more information on the different types of layers. | |
| * | |
| * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or | |
| * {@link #LAYER_TYPE_HARDWARE} | |
| * | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| * @see #buildLayer() | |
| * @see #LAYER_TYPE_NONE | |
| * @see #LAYER_TYPE_SOFTWARE | |
| * @see #LAYER_TYPE_HARDWARE | |
| */ | |
| public int getLayerType() { | |
| return mLayerType; | |
| } | |
| /** | |
| * Forces this view's layer to be created and this view to be rendered | |
| * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, | |
| * invoking this method will have no effect. | |
| * | |
| * This method can for instance be used to render a view into its layer before | |
| * starting an animation. If this view is complex, rendering into the layer | |
| * before starting the animation will avoid skipping frames. | |
| * | |
| * @throws IllegalStateException If this view is not attached to a window | |
| * | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| */ | |
| public void buildLayer() { | |
| if (mLayerType == LAYER_TYPE_NONE) return; | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (attachInfo == null) { | |
| throw new IllegalStateException("This view must be attached to a window first"); | |
| } | |
| if (getWidth() == 0 || getHeight() == 0) { | |
| return; | |
| } | |
| switch (mLayerType) { | |
| case LAYER_TYPE_HARDWARE: | |
| updateDisplayListIfDirty(); | |
| if (attachInfo.mHardwareRenderer != null && mRenderNode.isValid()) { | |
| attachInfo.mHardwareRenderer.buildLayer(mRenderNode); | |
| } | |
| break; | |
| case LAYER_TYPE_SOFTWARE: | |
| buildDrawingCache(true); | |
| break; | |
| } | |
| } | |
| /** | |
| * If this View draws with a HardwareLayer, returns it. | |
| * Otherwise returns null | |
| * | |
| * TODO: Only TextureView uses this, can we eliminate it? | |
| */ | |
| HardwareLayer getHardwareLayer() { | |
| return null; | |
| } | |
| /** | |
| * Destroys all hardware rendering resources. This method is invoked | |
| * when the system needs to reclaim resources. Upon execution of this | |
| * method, you should free any OpenGL resources created by the view. | |
| * | |
| * Note: you <strong>must</strong> call | |
| * <code>super.destroyHardwareResources()</code> when overriding | |
| * this method. | |
| * | |
| * @hide | |
| */ | |
| @CallSuper | |
| protected void destroyHardwareResources() { | |
| // Although the Layer will be destroyed by RenderNode, we want to release | |
| // the staging display list, which is also a signal to RenderNode that it's | |
| // safe to free its copy of the display list as it knows that we will | |
| // push an updated DisplayList if we try to draw again | |
| resetDisplayList(); | |
| } | |
| /** | |
| * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call | |
| * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a | |
| * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when | |
| * the cache is enabled. To benefit from the cache, you must request the drawing cache by | |
| * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not | |
| * null.</p> | |
| * | |
| * <p>Enabling the drawing cache is similar to | |
| * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware | |
| * acceleration is turned off. When hardware acceleration is turned on, enabling the | |
| * drawing cache has no effect on rendering because the system uses a different mechanism | |
| * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even | |
| * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} | |
| * for information on how to enable software and hardware layers.</p> | |
| * | |
| * <p>This API can be used to manually generate | |
| * a bitmap copy of this view, by setting the flag to <code>true</code> and calling | |
| * {@link #getDrawingCache()}.</p> | |
| * | |
| * @param enabled true to enable the drawing cache, false otherwise | |
| * | |
| * @see #isDrawingCacheEnabled() | |
| * @see #getDrawingCache() | |
| * @see #buildDrawingCache() | |
| * @see #setLayerType(int, android.graphics.Paint) | |
| */ | |
| public void setDrawingCacheEnabled(boolean enabled) { | |
| mCachingFailed = false; | |
| setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); | |
| } | |
| /** | |
| * <p>Indicates whether the drawing cache is enabled for this view.</p> | |
| * | |
| * @return true if the drawing cache is enabled | |
| * | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #getDrawingCache() | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean isDrawingCacheEnabled() { | |
| return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; | |
| } | |
| /** | |
| * Debugging utility which recursively outputs the dirty state of a view and its | |
| * descendants. | |
| * | |
| * @hide | |
| */ | |
| @SuppressWarnings({"UnusedDeclaration"}) | |
| public void outputDirtyFlags(String indent, boolean clear, int clearMask) { | |
| Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + | |
| ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + | |
| (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + | |
| ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); | |
| if (clear) { | |
| mPrivateFlags &= clearMask; | |
| } | |
| if (this instanceof ViewGroup) { | |
| ViewGroup parent = (ViewGroup) this; | |
| final int count = parent.getChildCount(); | |
| for (int i = 0; i < count; i++) { | |
| final View child = parent.getChildAt(i); | |
| child.outputDirtyFlags(indent + " ", clear, clearMask); | |
| } | |
| } | |
| } | |
| /** | |
| * This method is used by ViewGroup to cause its children to restore or recreate their | |
| * display lists. It is called by getDisplayList() when the parent ViewGroup does not need | |
| * to recreate its own display list, which would happen if it went through the normal | |
| * draw/dispatchDraw mechanisms. | |
| * | |
| * @hide | |
| */ | |
| protected void dispatchGetDisplayList() {} | |
| /** | |
| * A view that is not attached or hardware accelerated cannot create a display list. | |
| * This method checks these conditions and returns the appropriate result. | |
| * | |
| * @return true if view has the ability to create a display list, false otherwise. | |
| * | |
| * @hide | |
| */ | |
| public boolean canHaveDisplayList() { | |
| return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); | |
| } | |
| /** | |
| * Gets the RenderNode for the view, and updates its DisplayList (if needed and supported) | |
| * @hide | |
| */ | |
| @NonNull | |
| public RenderNode updateDisplayListIfDirty() { | |
| final RenderNode renderNode = mRenderNode; | |
| if (!canHaveDisplayList()) { | |
| // can't populate RenderNode, don't try | |
| return renderNode; | |
| } | |
| if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 | |
| || !renderNode.isValid() | |
| || (mRecreateDisplayList)) { | |
| // Don't need to recreate the display list, just need to tell our | |
| // children to restore/recreate theirs | |
| if (renderNode.isValid() | |
| && !mRecreateDisplayList) { | |
| mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| dispatchGetDisplayList(); | |
| return renderNode; // no work needed | |
| } | |
| // If we got here, we're recreating it. Mark it as such to ensure that | |
| // we copy in child display lists into ours in drawChild() | |
| mRecreateDisplayList = true; | |
| int width = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| int layerType = getLayerType(); | |
| final DisplayListCanvas canvas = renderNode.start(width, height); | |
| canvas.setHighContrastText(mAttachInfo.mHighContrastText); | |
| try { | |
| final HardwareLayer layer = getHardwareLayer(); | |
| if (layer != null && layer.isValid()) { | |
| canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); | |
| } else if (layerType == LAYER_TYPE_SOFTWARE) { | |
| buildDrawingCache(true); | |
| Bitmap cache = getDrawingCache(true); | |
| if (cache != null) { | |
| canvas.drawBitmap(cache, 0, 0, mLayerPaint); | |
| } | |
| } else { | |
| computeScroll(); | |
| canvas.translate(-mScrollX, -mScrollY); | |
| mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| // Fast path for layouts with no backgrounds | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { | |
| dispatchDraw(canvas); | |
| if (mOverlay != null && !mOverlay.isEmpty()) { | |
| mOverlay.getOverlayView().draw(canvas); | |
| } | |
| } else { | |
| draw(canvas); | |
| } | |
| } | |
| } finally { | |
| renderNode.end(canvas); | |
| setDisplayListProperties(renderNode); | |
| } | |
| } else { | |
| mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| } | |
| return renderNode; | |
| } | |
| private void resetDisplayList() { | |
| if (mRenderNode.isValid()) { | |
| mRenderNode.destroyDisplayListData(); | |
| } | |
| if (mBackgroundRenderNode != null && mBackgroundRenderNode.isValid()) { | |
| mBackgroundRenderNode.destroyDisplayListData(); | |
| } | |
| } | |
| /** | |
| * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> | |
| * | |
| * @return A non-scaled bitmap representing this view or null if cache is disabled. | |
| * | |
| * @see #getDrawingCache(boolean) | |
| */ | |
| public Bitmap getDrawingCache() { | |
| return getDrawingCache(false); | |
| } | |
| /** | |
| * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap | |
| * is null when caching is disabled. If caching is enabled and the cache is not ready, | |
| * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not | |
| * draw from the cache when the cache is enabled. To benefit from the cache, you must | |
| * request the drawing cache by calling this method and draw it on screen if the | |
| * returned bitmap is not null.</p> | |
| * | |
| * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, | |
| * this method will create a bitmap of the same size as this view. Because this bitmap | |
| * will be drawn scaled by the parent ViewGroup, the result on screen might show | |
| * scaling artifacts. To avoid such artifacts, you should call this method by setting | |
| * the auto scaling to true. Doing so, however, will generate a bitmap of a different | |
| * size than the view. This implies that your application must be able to handle this | |
| * size.</p> | |
| * | |
| * @param autoScale Indicates whether the generated bitmap should be scaled based on | |
| * the current density of the screen when the application is in compatibility | |
| * mode. | |
| * | |
| * @return A bitmap representing this view or null if cache is disabled. | |
| * | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #isDrawingCacheEnabled() | |
| * @see #buildDrawingCache(boolean) | |
| * @see #destroyDrawingCache() | |
| */ | |
| public Bitmap getDrawingCache(boolean autoScale) { | |
| if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { | |
| return null; | |
| } | |
| if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { | |
| buildDrawingCache(autoScale); | |
| } | |
| return autoScale ? mDrawingCache : mUnscaledDrawingCache; | |
| } | |
| /** | |
| * <p>Frees the resources used by the drawing cache. If you call | |
| * {@link #buildDrawingCache()} manually without calling | |
| * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you | |
| * should cleanup the cache with this method afterwards.</p> | |
| * | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #buildDrawingCache() | |
| * @see #getDrawingCache() | |
| */ | |
| public void destroyDrawingCache() { | |
| if (mDrawingCache != null) { | |
| mDrawingCache.recycle(); | |
| mDrawingCache = null; | |
| } | |
| if (mUnscaledDrawingCache != null) { | |
| mUnscaledDrawingCache.recycle(); | |
| mUnscaledDrawingCache = null; | |
| } | |
| } | |
| /** | |
| * Setting a solid background color for the drawing cache's bitmaps will improve | |
| * performance and memory usage. Note, though that this should only be used if this | |
| * view will always be drawn on top of a solid color. | |
| * | |
| * @param color The background color to use for the drawing cache's bitmap | |
| * | |
| * @see #setDrawingCacheEnabled(boolean) | |
| * @see #buildDrawingCache() | |
| * @see #getDrawingCache() | |
| */ | |
| public void setDrawingCacheBackgroundColor(@ColorInt int color) { | |
| if (color != mDrawingCacheBackgroundColor) { | |
| mDrawingCacheBackgroundColor = color; | |
| mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; | |
| } | |
| } | |
| /** | |
| * @see #setDrawingCacheBackgroundColor(int) | |
| * | |
| * @return The background color to used for the drawing cache's bitmap | |
| */ | |
| @ColorInt | |
| public int getDrawingCacheBackgroundColor() { | |
| return mDrawingCacheBackgroundColor; | |
| } | |
| /** | |
| * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> | |
| * | |
| * @see #buildDrawingCache(boolean) | |
| */ | |
| public void buildDrawingCache() { | |
| buildDrawingCache(false); | |
| } | |
| /** | |
| * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> | |
| * | |
| * <p>If you call {@link #buildDrawingCache()} manually without calling | |
| * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you | |
| * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> | |
| * | |
| * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, | |
| * this method will create a bitmap of the same size as this view. Because this bitmap | |
| * will be drawn scaled by the parent ViewGroup, the result on screen might show | |
| * scaling artifacts. To avoid such artifacts, you should call this method by setting | |
| * the auto scaling to true. Doing so, however, will generate a bitmap of a different | |
| * size than the view. This implies that your application must be able to handle this | |
| * size.</p> | |
| * | |
| * <p>You should avoid calling this method when hardware acceleration is enabled. If | |
| * you do not need the drawing cache bitmap, calling this method will increase memory | |
| * usage and cause the view to be rendered in software once, thus negatively impacting | |
| * performance.</p> | |
| * | |
| * @see #getDrawingCache() | |
| * @see #destroyDrawingCache() | |
| */ | |
| public void buildDrawingCache(boolean autoScale) { | |
| if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? | |
| mDrawingCache == null : mUnscaledDrawingCache == null)) { | |
| if (Trace.isTagEnabled(Trace.TRACE_TAG_VIEW)) { | |
| Trace.traceBegin(Trace.TRACE_TAG_VIEW, | |
| "buildDrawingCache/SW Layer for " + getClass().getSimpleName()); | |
| } | |
| try { | |
| buildDrawingCacheImpl(autoScale); | |
| } finally { | |
| Trace.traceEnd(Trace.TRACE_TAG_VIEW); | |
| } | |
| } | |
| } | |
| /** | |
| * private, internal implementation of buildDrawingCache, used to enable tracing | |
| */ | |
| private void buildDrawingCacheImpl(boolean autoScale) { | |
| mCachingFailed = false; | |
| int width = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| final AttachInfo attachInfo = mAttachInfo; | |
| final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; | |
| if (autoScale && scalingRequired) { | |
| width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); | |
| height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); | |
| } | |
| final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; | |
| final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); | |
| final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; | |
| final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); | |
| final long drawingCacheSize = | |
| ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); | |
| if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { | |
| if (width > 0 && height > 0) { | |
| Log.w(VIEW_LOG_TAG, getClass().getSimpleName() + " not displayed because it is" | |
| + " too large to fit into a software layer (or drawing cache), needs " | |
| + projectedBitmapSize + " bytes, only " | |
| + drawingCacheSize + " available"); | |
| } | |
| destroyDrawingCache(); | |
| mCachingFailed = true; | |
| return; | |
| } | |
| boolean clear = true; | |
| Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; | |
| if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { | |
| Bitmap.Config quality; | |
| if (!opaque) { | |
| // Never pick ARGB_4444 because it looks awful | |
| // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case | |
| switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { | |
| case DRAWING_CACHE_QUALITY_AUTO: | |
| case DRAWING_CACHE_QUALITY_LOW: | |
| case DRAWING_CACHE_QUALITY_HIGH: | |
| default: | |
| quality = Bitmap.Config.ARGB_8888; | |
| break; | |
| } | |
| } else { | |
| // Optimization for translucent windows | |
| // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() | |
| quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; | |
| } | |
| // Try to cleanup memory | |
| if (bitmap != null) bitmap.recycle(); | |
| try { | |
| bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), | |
| width, height, quality); | |
| bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); | |
| if (autoScale) { | |
| mDrawingCache = bitmap; | |
| } else { | |
| mUnscaledDrawingCache = bitmap; | |
| } | |
| if (opaque && use32BitCache) bitmap.setHasAlpha(false); | |
| } catch (OutOfMemoryError e) { | |
| // If there is not enough memory to create the bitmap cache, just | |
| // ignore the issue as bitmap caches are not required to draw the | |
| // view hierarchy | |
| if (autoScale) { | |
| mDrawingCache = null; | |
| } else { | |
| mUnscaledDrawingCache = null; | |
| } | |
| mCachingFailed = true; | |
| return; | |
| } | |
| clear = drawingCacheBackgroundColor != 0; | |
| } | |
| Canvas canvas; | |
| if (attachInfo != null) { | |
| canvas = attachInfo.mCanvas; | |
| if (canvas == null) { | |
| canvas = new Canvas(); | |
| } | |
| canvas.setBitmap(bitmap); | |
| // Temporarily clobber the cached Canvas in case one of our children | |
| // is also using a drawing cache. Without this, the children would | |
| // steal the canvas by attaching their own bitmap to it and bad, bad | |
| // thing would happen (invisible views, corrupted drawings, etc.) | |
| attachInfo.mCanvas = null; | |
| } else { | |
| // This case should hopefully never or seldom happen | |
| canvas = new Canvas(bitmap); | |
| } | |
| if (clear) { | |
| bitmap.eraseColor(drawingCacheBackgroundColor); | |
| } | |
| computeScroll(); | |
| final int restoreCount = canvas.save(); | |
| if (autoScale && scalingRequired) { | |
| final float scale = attachInfo.mApplicationScale; | |
| canvas.scale(scale, scale); | |
| } | |
| canvas.translate(-mScrollX, -mScrollY); | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || | |
| mLayerType != LAYER_TYPE_NONE) { | |
| mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; | |
| } | |
| // Fast path for layouts with no backgrounds | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| dispatchDraw(canvas); | |
| if (mOverlay != null && !mOverlay.isEmpty()) { | |
| mOverlay.getOverlayView().draw(canvas); | |
| } | |
| } else { | |
| draw(canvas); | |
| } | |
| canvas.restoreToCount(restoreCount); | |
| canvas.setBitmap(null); | |
| if (attachInfo != null) { | |
| // Restore the cached Canvas for our siblings | |
| attachInfo.mCanvas = canvas; | |
| } | |
| } | |
| /** | |
| * Create a snapshot of the view into a bitmap. We should probably make | |
| * some form of this public, but should think about the API. | |
| */ | |
| Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { | |
| int width = mRight - mLeft; | |
| int height = mBottom - mTop; | |
| final AttachInfo attachInfo = mAttachInfo; | |
| final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; | |
| width = (int) ((width * scale) + 0.5f); | |
| height = (int) ((height * scale) + 0.5f); | |
| Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), | |
| width > 0 ? width : 1, height > 0 ? height : 1, quality); | |
| if (bitmap == null) { | |
| throw new OutOfMemoryError(); | |
| } | |
| Resources resources = getResources(); | |
| if (resources != null) { | |
| bitmap.setDensity(resources.getDisplayMetrics().densityDpi); | |
| } | |
| Canvas canvas; | |
| if (attachInfo != null) { | |
| canvas = attachInfo.mCanvas; | |
| if (canvas == null) { | |
| canvas = new Canvas(); | |
| } | |
| canvas.setBitmap(bitmap); | |
| // Temporarily clobber the cached Canvas in case one of our children | |
| // is also using a drawing cache. Without this, the children would | |
| // steal the canvas by attaching their own bitmap to it and bad, bad | |
| // things would happen (invisible views, corrupted drawings, etc.) | |
| attachInfo.mCanvas = null; | |
| } else { | |
| // This case should hopefully never or seldom happen | |
| canvas = new Canvas(bitmap); | |
| } | |
| if ((backgroundColor & 0xff000000) != 0) { | |
| bitmap.eraseColor(backgroundColor); | |
| } | |
| computeScroll(); | |
| final int restoreCount = canvas.save(); | |
| canvas.scale(scale, scale); | |
| canvas.translate(-mScrollX, -mScrollY); | |
| // Temporarily remove the dirty mask | |
| int flags = mPrivateFlags; | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| // Fast path for layouts with no backgrounds | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { | |
| dispatchDraw(canvas); | |
| if (mOverlay != null && !mOverlay.isEmpty()) { | |
| mOverlay.getOverlayView().draw(canvas); | |
| } | |
| } else { | |
| draw(canvas); | |
| } | |
| mPrivateFlags = flags; | |
| canvas.restoreToCount(restoreCount); | |
| canvas.setBitmap(null); | |
| if (attachInfo != null) { | |
| // Restore the cached Canvas for our siblings | |
| attachInfo.mCanvas = canvas; | |
| } | |
| return bitmap; | |
| } | |
| /** | |
| * Indicates whether this View is currently in edit mode. A View is usually | |
| * in edit mode when displayed within a developer tool. For instance, if | |
| * this View is being drawn by a visual user interface builder, this method | |
| * should return true. | |
| * | |
| * Subclasses should check the return value of this method to provide | |
| * different behaviors if their normal behavior might interfere with the | |
| * host environment. For instance: the class spawns a thread in its | |
| * constructor, the drawing code relies on device-specific features, etc. | |
| * | |
| * This method is usually checked in the drawing code of custom widgets. | |
| * | |
| * @return True if this View is in edit mode, false otherwise. | |
| */ | |
| public boolean isInEditMode() { | |
| return false; | |
| } | |
| /** | |
| * If the View draws content inside its padding and enables fading edges, | |
| * it needs to support padding offsets. Padding offsets are added to the | |
| * fading edges to extend the length of the fade so that it covers pixels | |
| * drawn inside the padding. | |
| * | |
| * Subclasses of this class should override this method if they need | |
| * to draw content inside the padding. | |
| * | |
| * @return True if padding offset must be applied, false otherwise. | |
| * | |
| * @see #getLeftPaddingOffset() | |
| * @see #getRightPaddingOffset() | |
| * @see #getTopPaddingOffset() | |
| * @see #getBottomPaddingOffset() | |
| * | |
| * @since CURRENT | |
| */ | |
| protected boolean isPaddingOffsetRequired() { | |
| return false; | |
| } | |
| /** | |
| * Amount by which to extend the left fading region. Called only when | |
| * {@link #isPaddingOffsetRequired()} returns true. | |
| * | |
| * @return The left padding offset in pixels. | |
| * | |
| * @see #isPaddingOffsetRequired() | |
| * | |
| * @since CURRENT | |
| */ | |
| protected int getLeftPaddingOffset() { | |
| return 0; | |
| } | |
| /** | |
| * Amount by which to extend the right fading region. Called only when | |
| * {@link #isPaddingOffsetRequired()} returns true. | |
| * | |
| * @return The right padding offset in pixels. | |
| * | |
| * @see #isPaddingOffsetRequired() | |
| * | |
| * @since CURRENT | |
| */ | |
| protected int getRightPaddingOffset() { | |
| return 0; | |
| } | |
| /** | |
| * Amount by which to extend the top fading region. Called only when | |
| * {@link #isPaddingOffsetRequired()} returns true. | |
| * | |
| * @return The top padding offset in pixels. | |
| * | |
| * @see #isPaddingOffsetRequired() | |
| * | |
| * @since CURRENT | |
| */ | |
| protected int getTopPaddingOffset() { | |
| return 0; | |
| } | |
| /** | |
| * Amount by which to extend the bottom fading region. Called only when | |
| * {@link #isPaddingOffsetRequired()} returns true. | |
| * | |
| * @return The bottom padding offset in pixels. | |
| * | |
| * @see #isPaddingOffsetRequired() | |
| * | |
| * @since CURRENT | |
| */ | |
| protected int getBottomPaddingOffset() { | |
| return 0; | |
| } | |
| /** | |
| * @hide | |
| * @param offsetRequired | |
| */ | |
| protected int getFadeTop(boolean offsetRequired) { | |
| int top = mPaddingTop; | |
| if (offsetRequired) top += getTopPaddingOffset(); | |
| return top; | |
| } | |
| /** | |
| * @hide | |
| * @param offsetRequired | |
| */ | |
| protected int getFadeHeight(boolean offsetRequired) { | |
| int padding = mPaddingTop; | |
| if (offsetRequired) padding += getTopPaddingOffset(); | |
| return mBottom - mTop - mPaddingBottom - padding; | |
| } | |
| /** | |
| * <p>Indicates whether this view is attached to a hardware accelerated | |
| * window or not.</p> | |
| * | |
| * <p>Even if this method returns true, it does not mean that every call | |
| * to {@link #draw(android.graphics.Canvas)} will be made with an hardware | |
| * accelerated {@link android.graphics.Canvas}. For instance, if this view | |
| * is drawn onto an offscreen {@link android.graphics.Bitmap} and its | |
| * window is hardware accelerated, | |
| * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely | |
| * return false, and this method will return true.</p> | |
| * | |
| * @return True if the view is attached to a window and the window is | |
| * hardware accelerated; false in any other case. | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| public boolean isHardwareAccelerated() { | |
| return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; | |
| } | |
| /** | |
| * Sets a rectangular area on this view to which the view will be clipped | |
| * when it is drawn. Setting the value to null will remove the clip bounds | |
| * and the view will draw normally, using its full bounds. | |
| * | |
| * @param clipBounds The rectangular area, in the local coordinates of | |
| * this view, to which future drawing operations will be clipped. | |
| */ | |
| public void setClipBounds(Rect clipBounds) { | |
| if (clipBounds == mClipBounds | |
| || (clipBounds != null && clipBounds.equals(mClipBounds))) { | |
| return; | |
| } | |
| if (clipBounds != null) { | |
| if (mClipBounds == null) { | |
| mClipBounds = new Rect(clipBounds); | |
| } else { | |
| mClipBounds.set(clipBounds); | |
| } | |
| } else { | |
| mClipBounds = null; | |
| } | |
| mRenderNode.setClipBounds(mClipBounds); | |
| invalidateViewProperty(false, false); | |
| } | |
| /** | |
| * Returns a copy of the current {@link #setClipBounds(Rect) clipBounds}. | |
| * | |
| * @return A copy of the current clip bounds if clip bounds are set, | |
| * otherwise null. | |
| */ | |
| public Rect getClipBounds() { | |
| return (mClipBounds != null) ? new Rect(mClipBounds) : null; | |
| } | |
| /** | |
| * Populates an output rectangle with the clip bounds of the view, | |
| * returning {@code true} if successful or {@code false} if the view's | |
| * clip bounds are {@code null}. | |
| * | |
| * @param outRect rectangle in which to place the clip bounds of the view | |
| * @return {@code true} if successful or {@code false} if the view's | |
| * clip bounds are {@code null} | |
| */ | |
| public boolean getClipBounds(Rect outRect) { | |
| if (mClipBounds != null) { | |
| outRect.set(mClipBounds); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common | |
| * case of an active Animation being run on the view. | |
| */ | |
| private boolean applyLegacyAnimation(ViewGroup parent, long drawingTime, | |
| Animation a, boolean scalingRequired) { | |
| Transformation invalidationTransform; | |
| final int flags = parent.mGroupFlags; | |
| final boolean initialized = a.isInitialized(); | |
| if (!initialized) { | |
| a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); | |
| a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); | |
| if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); | |
| onAnimationStart(); | |
| } | |
| final Transformation t = parent.getChildTransformation(); | |
| boolean more = a.getTransformation(drawingTime, t, 1f); | |
| if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { | |
| if (parent.mInvalidationTransformation == null) { | |
| parent.mInvalidationTransformation = new Transformation(); | |
| } | |
| invalidationTransform = parent.mInvalidationTransformation; | |
| a.getTransformation(drawingTime, invalidationTransform, 1f); | |
| } else { | |
| invalidationTransform = t; | |
| } | |
| if (more) { | |
| if (!a.willChangeBounds()) { | |
| if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == | |
| ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { | |
| parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; | |
| } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { | |
| // The child need to draw an animation, potentially offscreen, so | |
| // make sure we do not cancel invalidate requests | |
| parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; | |
| parent.invalidate(mLeft, mTop, mRight, mBottom); | |
| } | |
| } else { | |
| if (parent.mInvalidateRegion == null) { | |
| parent.mInvalidateRegion = new RectF(); | |
| } | |
| final RectF region = parent.mInvalidateRegion; | |
| a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, | |
| invalidationTransform); | |
| // The child need to draw an animation, potentially offscreen, so | |
| // make sure we do not cancel invalidate requests | |
| parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; | |
| final int left = mLeft + (int) region.left; | |
| final int top = mTop + (int) region.top; | |
| parent.invalidate(left, top, left + (int) (region.width() + .5f), | |
| top + (int) (region.height() + .5f)); | |
| } | |
| } | |
| return more; | |
| } | |
| /** | |
| * This method is called by getDisplayList() when a display list is recorded for a View. | |
| * It pushes any properties to the RenderNode that aren't managed by the RenderNode. | |
| */ | |
| void setDisplayListProperties(RenderNode renderNode) { | |
| if (renderNode != null) { | |
| renderNode.setHasOverlappingRendering(hasOverlappingRendering()); | |
| renderNode.setClipToBounds(mParent instanceof ViewGroup | |
| && ((ViewGroup) mParent).getClipChildren()); | |
| float alpha = 1; | |
| if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & | |
| ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { | |
| ViewGroup parentVG = (ViewGroup) mParent; | |
| final Transformation t = parentVG.getChildTransformation(); | |
| if (parentVG.getChildStaticTransformation(this, t)) { | |
| final int transformType = t.getTransformationType(); | |
| if (transformType != Transformation.TYPE_IDENTITY) { | |
| if ((transformType & Transformation.TYPE_ALPHA) != 0) { | |
| alpha = t.getAlpha(); | |
| } | |
| if ((transformType & Transformation.TYPE_MATRIX) != 0) { | |
| renderNode.setStaticMatrix(t.getMatrix()); | |
| } | |
| } | |
| } | |
| } | |
| if (mTransformationInfo != null) { | |
| alpha *= getFinalAlpha(); | |
| if (alpha < 1) { | |
| final int multipliedAlpha = (int) (255 * alpha); | |
| if (onSetAlpha(multipliedAlpha)) { | |
| alpha = 1; | |
| } | |
| } | |
| renderNode.setAlpha(alpha); | |
| } else if (alpha < 1) { | |
| renderNode.setAlpha(alpha); | |
| } | |
| } | |
| } | |
| /** | |
| * This method is called by ViewGroup.drawChild() to have each child view draw itself. | |
| * | |
| * This is where the View specializes rendering behavior based on layer type, | |
| * and hardware acceleration. | |
| */ | |
| boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { | |
| final boolean hardwareAcceleratedCanvas = canvas.isHardwareAccelerated(); | |
| /* If an attached view draws to a HW canvas, it may use its RenderNode + DisplayList. | |
| * | |
| * If a view is dettached, its DisplayList shouldn't exist. If the canvas isn't | |
| * HW accelerated, it can't handle drawing RenderNodes. | |
| */ | |
| boolean drawingWithRenderNode = mAttachInfo != null | |
| && mAttachInfo.mHardwareAccelerated | |
| && hardwareAcceleratedCanvas; | |
| boolean more = false; | |
| final boolean childHasIdentityMatrix = hasIdentityMatrix(); | |
| final int parentFlags = parent.mGroupFlags; | |
| if ((parentFlags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) != 0) { | |
| parent.getChildTransformation().clear(); | |
| parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; | |
| } | |
| Transformation transformToApply = null; | |
| boolean concatMatrix = false; | |
| final boolean scalingRequired = mAttachInfo != null && mAttachInfo.mScalingRequired; | |
| final Animation a = getAnimation(); | |
| if (a != null) { | |
| more = applyLegacyAnimation(parent, drawingTime, a, scalingRequired); | |
| concatMatrix = a.willChangeTransformationMatrix(); | |
| if (concatMatrix) { | |
| mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; | |
| } | |
| transformToApply = parent.getChildTransformation(); | |
| } else { | |
| if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) != 0) { | |
| // No longer animating: clear out old animation matrix | |
| mRenderNode.setAnimationMatrix(null); | |
| mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; | |
| } | |
| if (!drawingWithRenderNode | |
| && (parentFlags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { | |
| final Transformation t = parent.getChildTransformation(); | |
| final boolean hasTransform = parent.getChildStaticTransformation(this, t); | |
| if (hasTransform) { | |
| final int transformType = t.getTransformationType(); | |
| transformToApply = transformType != Transformation.TYPE_IDENTITY ? t : null; | |
| concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; | |
| } | |
| } | |
| } | |
| concatMatrix |= !childHasIdentityMatrix; | |
| // Sets the flag as early as possible to allow draw() implementations | |
| // to call invalidate() successfully when doing animations | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| if (!concatMatrix && | |
| (parentFlags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | | |
| ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && | |
| canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && | |
| (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { | |
| mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; | |
| return more; | |
| } | |
| mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; | |
| if (hardwareAcceleratedCanvas) { | |
| // Clear INVALIDATED flag to allow invalidation to occur during rendering, but | |
| // retain the flag's value temporarily in the mRecreateDisplayList flag | |
| mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) != 0; | |
| mPrivateFlags &= ~PFLAG_INVALIDATED; | |
| } | |
| RenderNode renderNode = null; | |
| Bitmap cache = null; | |
| int layerType = getLayerType(); // TODO: signify cache state with just 'cache' local | |
| if (layerType == LAYER_TYPE_SOFTWARE | |
| || (!drawingWithRenderNode && layerType != LAYER_TYPE_NONE)) { | |
| // If not drawing with RenderNode, treat HW layers as SW | |
| layerType = LAYER_TYPE_SOFTWARE; | |
| buildDrawingCache(true); | |
| cache = getDrawingCache(true); | |
| } | |
| if (drawingWithRenderNode) { | |
| // Delay getting the display list until animation-driven alpha values are | |
| // set up and possibly passed on to the view | |
| renderNode = updateDisplayListIfDirty(); | |
| if (!renderNode.isValid()) { | |
| // Uncommon, but possible. If a view is removed from the hierarchy during the call | |
| // to getDisplayList(), the display list will be marked invalid and we should not | |
| // try to use it again. | |
| renderNode = null; | |
| drawingWithRenderNode = false; | |
| } | |
| } | |
| int sx = 0; | |
| int sy = 0; | |
| if (!drawingWithRenderNode) { | |
| computeScroll(); | |
| sx = mScrollX; | |
| sy = mScrollY; | |
| } | |
| final boolean drawingWithDrawingCache = cache != null && !drawingWithRenderNode; | |
| final boolean offsetForScroll = cache == null && !drawingWithRenderNode; | |
| int restoreTo = -1; | |
| if (!drawingWithRenderNode || transformToApply != null) { | |
| restoreTo = canvas.save(); | |
| } | |
| if (offsetForScroll) { | |
| canvas.translate(mLeft - sx, mTop - sy); | |
| } else { | |
| if (!drawingWithRenderNode) { | |
| canvas.translate(mLeft, mTop); | |
| } | |
| if (scalingRequired) { | |
| if (drawingWithRenderNode) { | |
| // TODO: Might not need this if we put everything inside the DL | |
| restoreTo = canvas.save(); | |
| } | |
| // mAttachInfo cannot be null, otherwise scalingRequired == false | |
| final float scale = 1.0f / mAttachInfo.mApplicationScale; | |
| canvas.scale(scale, scale); | |
| } | |
| } | |
| float alpha = drawingWithRenderNode ? 1 : (getAlpha() * getTransitionAlpha()); | |
| if (transformToApply != null | |
| || alpha < 1 | |
| || !hasIdentityMatrix() | |
| || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { | |
| if (transformToApply != null || !childHasIdentityMatrix) { | |
| int transX = 0; | |
| int transY = 0; | |
| if (offsetForScroll) { | |
| transX = -sx; | |
| transY = -sy; | |
| } | |
| if (transformToApply != null) { | |
| if (concatMatrix) { | |
| if (drawingWithRenderNode) { | |
| renderNode.setAnimationMatrix(transformToApply.getMatrix()); | |
| } else { | |
| // Undo the scroll translation, apply the transformation matrix, | |
| // then redo the scroll translate to get the correct result. | |
| canvas.translate(-transX, -transY); | |
| canvas.concat(transformToApply.getMatrix()); | |
| canvas.translate(transX, transY); | |
| } | |
| parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; | |
| } | |
| float transformAlpha = transformToApply.getAlpha(); | |
| if (transformAlpha < 1) { | |
| alpha *= transformAlpha; | |
| parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; | |
| } | |
| } | |
| if (!childHasIdentityMatrix && !drawingWithRenderNode) { | |
| canvas.translate(-transX, -transY); | |
| canvas.concat(getMatrix()); | |
| canvas.translate(transX, transY); | |
| } | |
| } | |
| // Deal with alpha if it is or used to be <1 | |
| if (alpha < 1 || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { | |
| if (alpha < 1) { | |
| mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; | |
| } else { | |
| mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; | |
| } | |
| parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; | |
| if (!drawingWithDrawingCache) { | |
| final int multipliedAlpha = (int) (255 * alpha); | |
| if (!onSetAlpha(multipliedAlpha)) { | |
| if (drawingWithRenderNode) { | |
| renderNode.setAlpha(alpha * getAlpha() * getTransitionAlpha()); | |
| } else if (layerType == LAYER_TYPE_NONE) { | |
| canvas.saveLayerAlpha(sx, sy, sx + getWidth(), sy + getHeight(), | |
| multipliedAlpha); | |
| } | |
| } else { | |
| // Alpha is handled by the child directly, clobber the layer's alpha | |
| mPrivateFlags |= PFLAG_ALPHA_SET; | |
| } | |
| } | |
| } | |
| } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { | |
| onSetAlpha(255); | |
| mPrivateFlags &= ~PFLAG_ALPHA_SET; | |
| } | |
| if (!drawingWithRenderNode) { | |
| // apply clips directly, since RenderNode won't do it for this draw | |
| if ((parentFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 && cache == null) { | |
| if (offsetForScroll) { | |
| canvas.clipRect(sx, sy, sx + getWidth(), sy + getHeight()); | |
| } else { | |
| if (!scalingRequired || cache == null) { | |
| canvas.clipRect(0, 0, getWidth(), getHeight()); | |
| } else { | |
| canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); | |
| } | |
| } | |
| } | |
| if (mClipBounds != null) { | |
| // clip bounds ignore scroll | |
| canvas.clipRect(mClipBounds); | |
| } | |
| } | |
| if (!drawingWithDrawingCache) { | |
| if (drawingWithRenderNode) { | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| ((DisplayListCanvas) canvas).drawRenderNode(renderNode); | |
| } else { | |
| // Fast path for layouts with no backgrounds | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| dispatchDraw(canvas); | |
| } else { | |
| draw(canvas); | |
| } | |
| } | |
| } else if (cache != null) { | |
| mPrivateFlags &= ~PFLAG_DIRTY_MASK; | |
| if (layerType == LAYER_TYPE_NONE) { | |
| // no layer paint, use temporary paint to draw bitmap | |
| Paint cachePaint = parent.mCachePaint; | |
| if (cachePaint == null) { | |
| cachePaint = new Paint(); | |
| cachePaint.setDither(false); | |
| parent.mCachePaint = cachePaint; | |
| } | |
| cachePaint.setAlpha((int) (alpha * 255)); | |
| canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); | |
| } else { | |
| // use layer paint to draw the bitmap, merging the two alphas, but also restore | |
| int layerPaintAlpha = mLayerPaint.getAlpha(); | |
| mLayerPaint.setAlpha((int) (alpha * layerPaintAlpha)); | |
| canvas.drawBitmap(cache, 0.0f, 0.0f, mLayerPaint); | |
| mLayerPaint.setAlpha(layerPaintAlpha); | |
| } | |
| } | |
| if (restoreTo >= 0) { | |
| canvas.restoreToCount(restoreTo); | |
| } | |
| if (a != null && !more) { | |
| if (!hardwareAcceleratedCanvas && !a.getFillAfter()) { | |
| onSetAlpha(255); | |
| } | |
| parent.finishAnimatingView(this, a); | |
| } | |
| if (more && hardwareAcceleratedCanvas) { | |
| if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { | |
| // alpha animations should cause the child to recreate its display list | |
| invalidate(true); | |
| } | |
| } | |
| mRecreateDisplayList = false; | |
| return more; | |
| } | |
| /** | |
| * Manually render this view (and all of its children) to the given Canvas. | |
| * The view must have already done a full layout before this function is | |
| * called. When implementing a view, implement | |
| * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. | |
| * If you do need to override this method, call the superclass version. | |
| * | |
| * @param canvas The Canvas to which the View is rendered. | |
| */ | |
| @CallSuper | |
| public void draw(Canvas canvas) { | |
| final int privateFlags = mPrivateFlags; | |
| final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && | |
| (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); | |
| mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; | |
| /* | |
| * Draw traversal performs several drawing steps which must be executed | |
| * in the appropriate order: | |
| * | |
| * 1. Draw the background | |
| * 2. If necessary, save the canvas' layers to prepare for fading | |
| * 3. Draw view's content | |
| * 4. Draw children | |
| * 5. If necessary, draw the fading edges and restore layers | |
| * 6. Draw decorations (scrollbars for instance) | |
| */ | |
| // Step 1, draw the background, if needed | |
| int saveCount; | |
| if (!dirtyOpaque) { | |
| drawBackground(canvas); | |
| } | |
| // skip step 2 & 5 if possible (common case) | |
| final int viewFlags = mViewFlags; | |
| boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; | |
| boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; | |
| if (!verticalEdges && !horizontalEdges) { | |
| // Step 3, draw the content | |
| if (!dirtyOpaque) onDraw(canvas); | |
| // Step 4, draw the children | |
| dispatchDraw(canvas); | |
| // Overlay is part of the content and draws beneath Foreground | |
| if (mOverlay != null && !mOverlay.isEmpty()) { | |
| mOverlay.getOverlayView().dispatchDraw(canvas); | |
| } | |
| // Step 6, draw decorations (foreground, scrollbars) | |
| onDrawForeground(canvas); | |
| // we're done... | |
| return; | |
| } | |
| /* | |
| * Here we do the full fledged routine... | |
| * (this is an uncommon case where speed matters less, | |
| * this is why we repeat some of the tests that have been | |
| * done above) | |
| */ | |
| boolean drawTop = false; | |
| boolean drawBottom = false; | |
| boolean drawLeft = false; | |
| boolean drawRight = false; | |
| float topFadeStrength = 0.0f; | |
| float bottomFadeStrength = 0.0f; | |
| float leftFadeStrength = 0.0f; | |
| float rightFadeStrength = 0.0f; | |
| // Step 2, save the canvas' layers | |
| int paddingLeft = mPaddingLeft; | |
| final boolean offsetRequired = isPaddingOffsetRequired(); | |
| if (offsetRequired) { | |
| paddingLeft += getLeftPaddingOffset(); | |
| } | |
| int left = mScrollX + paddingLeft; | |
| int right = left + mRight - mLeft - mPaddingRight - paddingLeft; | |
| int top = mScrollY + getFadeTop(offsetRequired); | |
| int bottom = top + getFadeHeight(offsetRequired); | |
| if (offsetRequired) { | |
| right += getRightPaddingOffset(); | |
| bottom += getBottomPaddingOffset(); | |
| } | |
| final ScrollabilityCache scrollabilityCache = mScrollCache; | |
| final float fadeHeight = scrollabilityCache.fadingEdgeLength; | |
| int length = (int) fadeHeight; | |
| // clip the fade length if top and bottom fades overlap | |
| // overlapping fades produce odd-looking artifacts | |
| if (verticalEdges && (top + length > bottom - length)) { | |
| length = (bottom - top) / 2; | |
| } | |
| // also clip horizontal fades if necessary | |
| if (horizontalEdges && (left + length > right - length)) { | |
| length = (right - left) / 2; | |
| } | |
| if (verticalEdges) { | |
| topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); | |
| drawTop = topFadeStrength * fadeHeight > 1.0f; | |
| bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); | |
| drawBottom = bottomFadeStrength * fadeHeight > 1.0f; | |
| } | |
| if (horizontalEdges) { | |
| leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); | |
| drawLeft = leftFadeStrength * fadeHeight > 1.0f; | |
| rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); | |
| drawRight = rightFadeStrength * fadeHeight > 1.0f; | |
| } | |
| saveCount = canvas.getSaveCount(); | |
| int solidColor = getSolidColor(); | |
| if (solidColor == 0) { | |
| final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; | |
| if (drawTop) { | |
| canvas.saveLayer(left, top, right, top + length, null, flags); | |
| } | |
| if (drawBottom) { | |
| canvas.saveLayer(left, bottom - length, right, bottom, null, flags); | |
| } | |
| if (drawLeft) { | |
| canvas.saveLayer(left, top, left + length, bottom, null, flags); | |
| } | |
| if (drawRight) { | |
| canvas.saveLayer(right - length, top, right, bottom, null, flags); | |
| } | |
| } else { | |
| scrollabilityCache.setFadeColor(solidColor); | |
| } | |
| // Step 3, draw the content | |
| if (!dirtyOpaque) onDraw(canvas); | |
| // Step 4, draw the children | |
| dispatchDraw(canvas); | |
| // Step 5, draw the fade effect and restore layers | |
| final Paint p = scrollabilityCache.paint; | |
| final Matrix matrix = scrollabilityCache.matrix; | |
| final Shader fade = scrollabilityCache.shader; | |
| if (drawTop) { | |
| matrix.setScale(1, fadeHeight * topFadeStrength); | |
| matrix.postTranslate(left, top); | |
| fade.setLocalMatrix(matrix); | |
| p.setShader(fade); | |
| canvas.drawRect(left, top, right, top + length, p); | |
| } | |
| if (drawBottom) { | |
| matrix.setScale(1, fadeHeight * bottomFadeStrength); | |
| matrix.postRotate(180); | |
| matrix.postTranslate(left, bottom); | |
| fade.setLocalMatrix(matrix); | |
| p.setShader(fade); | |
| canvas.drawRect(left, bottom - length, right, bottom, p); | |
| } | |
| if (drawLeft) { | |
| matrix.setScale(1, fadeHeight * leftFadeStrength); | |
| matrix.postRotate(-90); | |
| matrix.postTranslate(left, top); | |
| fade.setLocalMatrix(matrix); | |
| p.setShader(fade); | |
| canvas.drawRect(left, top, left + length, bottom, p); | |
| } | |
| if (drawRight) { | |
| matrix.setScale(1, fadeHeight * rightFadeStrength); | |
| matrix.postRotate(90); | |
| matrix.postTranslate(right, top); | |
| fade.setLocalMatrix(matrix); | |
| p.setShader(fade); | |
| canvas.drawRect(right - length, top, right, bottom, p); | |
| } | |
| canvas.restoreToCount(saveCount); | |
| // Overlay is part of the content and draws beneath Foreground | |
| if (mOverlay != null && !mOverlay.isEmpty()) { | |
| mOverlay.getOverlayView().dispatchDraw(canvas); | |
| } | |
| // Step 6, draw decorations (foreground, scrollbars) | |
| onDrawForeground(canvas); | |
| } | |
| /** | |
| * Draws the background onto the specified canvas. | |
| * | |
| * @param canvas Canvas on which to draw the background | |
| */ | |
| private void drawBackground(Canvas canvas) { | |
| final Drawable background = mBackground; | |
| if (background == null) { | |
| return; | |
| } | |
| setBackgroundBounds(); | |
| // Attempt to use a display list if requested. | |
| if (canvas.isHardwareAccelerated() && mAttachInfo != null | |
| && mAttachInfo.mHardwareRenderer != null) { | |
| mBackgroundRenderNode = getDrawableRenderNode(background, mBackgroundRenderNode); | |
| final RenderNode renderNode = mBackgroundRenderNode; | |
| if (renderNode != null && renderNode.isValid()) { | |
| setBackgroundRenderNodeProperties(renderNode); | |
| ((DisplayListCanvas) canvas).drawRenderNode(renderNode); | |
| return; | |
| } | |
| } | |
| final int scrollX = mScrollX; | |
| final int scrollY = mScrollY; | |
| if ((scrollX | scrollY) == 0) { | |
| background.draw(canvas); | |
| } else { | |
| canvas.translate(scrollX, scrollY); | |
| background.draw(canvas); | |
| canvas.translate(-scrollX, -scrollY); | |
| } | |
| } | |
| /** | |
| * Sets the correct background bounds and rebuilds the outline, if needed. | |
| * <p/> | |
| * This is called by LayoutLib. | |
| */ | |
| void setBackgroundBounds() { | |
| if (mBackgroundSizeChanged && mBackground != null) { | |
| mBackground.setBounds(0, 0, mRight - mLeft, mBottom - mTop); | |
| mBackgroundSizeChanged = false; | |
| rebuildOutline(); | |
| } | |
| } | |
| private void setBackgroundRenderNodeProperties(RenderNode renderNode) { | |
| renderNode.setTranslationX(mScrollX); | |
| renderNode.setTranslationY(mScrollY); | |
| } | |
| /** | |
| * Creates a new display list or updates the existing display list for the | |
| * specified Drawable. | |
| * | |
| * @param drawable Drawable for which to create a display list | |
| * @param renderNode Existing RenderNode, or {@code null} | |
| * @return A valid display list for the specified drawable | |
| */ | |
| private RenderNode getDrawableRenderNode(Drawable drawable, RenderNode renderNode) { | |
| if (renderNode == null) { | |
| renderNode = RenderNode.create(drawable.getClass().getName(), this); | |
| } | |
| final Rect bounds = drawable.getBounds(); | |
| final int width = bounds.width(); | |
| final int height = bounds.height(); | |
| final DisplayListCanvas canvas = renderNode.start(width, height); | |
| // Reverse left/top translation done by drawable canvas, which will | |
| // instead be applied by rendernode's LTRB bounds below. This way, the | |
| // drawable's bounds match with its rendernode bounds and its content | |
| // will lie within those bounds in the rendernode tree. | |
| canvas.translate(-bounds.left, -bounds.top); | |
| try { | |
| drawable.draw(canvas); | |
| } finally { | |
| renderNode.end(canvas); | |
| } | |
| // Set up drawable properties that are view-independent. | |
| renderNode.setLeftTopRightBottom(bounds.left, bounds.top, bounds.right, bounds.bottom); | |
| renderNode.setProjectBackwards(drawable.isProjected()); | |
| renderNode.setProjectionReceiver(true); | |
| renderNode.setClipToBounds(false); | |
| return renderNode; | |
| } | |
| /** | |
| * Returns the overlay for this view, creating it if it does not yet exist. | |
| * Adding drawables to the overlay will cause them to be displayed whenever | |
| * the view itself is redrawn. Objects in the overlay should be actively | |
| * managed: remove them when they should not be displayed anymore. The | |
| * overlay will always have the same size as its host view. | |
| * | |
| * <p>Note: Overlays do not currently work correctly with {@link | |
| * SurfaceView} or {@link TextureView}; contents in overlays for these | |
| * types of views may not display correctly.</p> | |
| * | |
| * @return The ViewOverlay object for this view. | |
| * @see ViewOverlay | |
| */ | |
| public ViewOverlay getOverlay() { | |
| if (mOverlay == null) { | |
| mOverlay = new ViewOverlay(mContext, this); | |
| } | |
| return mOverlay; | |
| } | |
| /** | |
| * Override this if your view is known to always be drawn on top of a solid color background, | |
| * and needs to draw fading edges. Returning a non-zero color enables the view system to | |
| * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha | |
| * should be set to 0xFF. | |
| * | |
| * @see #setVerticalFadingEdgeEnabled(boolean) | |
| * @see #setHorizontalFadingEdgeEnabled(boolean) | |
| * | |
| * @return The known solid color background for this view, or 0 if the color may vary | |
| */ | |
| @ViewDebug.ExportedProperty(category = "drawing") | |
| @ColorInt | |
| public int getSolidColor() { | |
| return 0; | |
| } | |
| /** | |
| * Build a human readable string representation of the specified view flags. | |
| * | |
| * @param flags the view flags to convert to a string | |
| * @return a String representing the supplied flags | |
| */ | |
| private static String printFlags(int flags) { | |
| String output = ""; | |
| int numFlags = 0; | |
| if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { | |
| output += "TAKES_FOCUS"; | |
| numFlags++; | |
| } | |
| switch (flags & VISIBILITY_MASK) { | |
| case INVISIBLE: | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "INVISIBLE"; | |
| // USELESS HERE numFlags++; | |
| break; | |
| case GONE: | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "GONE"; | |
| // USELESS HERE numFlags++; | |
| break; | |
| default: | |
| break; | |
| } | |
| return output; | |
| } | |
| /** | |
| * Build a human readable string representation of the specified private | |
| * view flags. | |
| * | |
| * @param privateFlags the private view flags to convert to a string | |
| * @return a String representing the supplied flags | |
| */ | |
| private static String printPrivateFlags(int privateFlags) { | |
| String output = ""; | |
| int numFlags = 0; | |
| if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { | |
| output += "WANTS_FOCUS"; | |
| numFlags++; | |
| } | |
| if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "FOCUSED"; | |
| numFlags++; | |
| } | |
| if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "SELECTED"; | |
| numFlags++; | |
| } | |
| if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "IS_ROOT_NAMESPACE"; | |
| numFlags++; | |
| } | |
| if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "HAS_BOUNDS"; | |
| numFlags++; | |
| } | |
| if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { | |
| if (numFlags > 0) { | |
| output += " "; | |
| } | |
| output += "DRAWN"; | |
| // USELESS HERE numFlags++; | |
| } | |
| return output; | |
| } | |
| /** | |
| * <p>Indicates whether or not this view's layout will be requested during | |
| * the next hierarchy layout pass.</p> | |
| * | |
| * @return true if the layout will be forced during next layout pass | |
| */ | |
| public boolean isLayoutRequested() { | |
| return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; | |
| } | |
| /** | |
| * Return true if o is a ViewGroup that is laying out using optical bounds. | |
| * @hide | |
| */ | |
| public static boolean isLayoutModeOptical(Object o) { | |
| return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); | |
| } | |
| private boolean setOpticalFrame(int left, int top, int right, int bottom) { | |
| Insets parentInsets = mParent instanceof View ? | |
| ((View) mParent).getOpticalInsets() : Insets.NONE; | |
| Insets childInsets = getOpticalInsets(); | |
| return setFrame( | |
| left + parentInsets.left - childInsets.left, | |
| top + parentInsets.top - childInsets.top, | |
| right + parentInsets.left + childInsets.right, | |
| bottom + parentInsets.top + childInsets.bottom); | |
| } | |
| /** | |
| * Assign a size and position to a view and all of its | |
| * descendants | |
| * | |
| * <p>This is the second phase of the layout mechanism. | |
| * (The first is measuring). In this phase, each parent calls | |
| * layout on all of its children to position them. | |
| * This is typically done using the child measurements | |
| * that were stored in the measure pass().</p> | |
| * | |
| * <p>Derived classes should not override this method. | |
| * Derived classes with children should override | |
| * onLayout. In that method, they should | |
| * call layout on each of their children.</p> | |
| * | |
| * @param l Left position, relative to parent | |
| * @param t Top position, relative to parent | |
| * @param r Right position, relative to parent | |
| * @param b Bottom position, relative to parent | |
| */ | |
| @SuppressWarnings({"unchecked"}) | |
| public void layout(int l, int t, int r, int b) { | |
| if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) { | |
| onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec); | |
| mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; | |
| } | |
| int oldL = mLeft; | |
| int oldT = mTop; | |
| int oldB = mBottom; | |
| int oldR = mRight; | |
| boolean changed = isLayoutModeOptical(mParent) ? | |
| setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); | |
| if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { | |
| onLayout(changed, l, t, r, b); | |
| mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnLayoutChangeListeners != null) { | |
| ArrayList<OnLayoutChangeListener> listenersCopy = | |
| (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); | |
| int numListeners = listenersCopy.size(); | |
| for (int i = 0; i < numListeners; ++i) { | |
| listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); | |
| } | |
| } | |
| } | |
| mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; | |
| mPrivateFlags3 |= PFLAG3_IS_LAID_OUT; | |
| } | |
| /** | |
| * Called from layout when this view should | |
| * assign a size and position to each of its children. | |
| * | |
| * Derived classes with children should override | |
| * this method and call layout on each of | |
| * their children. | |
| * @param changed This is a new size or position for this view | |
| * @param left Left position, relative to parent | |
| * @param top Top position, relative to parent | |
| * @param right Right position, relative to parent | |
| * @param bottom Bottom position, relative to parent | |
| */ | |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { | |
| } | |
| /** | |
| * Assign a size and position to this view. | |
| * | |
| * This is called from layout. | |
| * | |
| * @param left Left position, relative to parent | |
| * @param top Top position, relative to parent | |
| * @param right Right position, relative to parent | |
| * @param bottom Bottom position, relative to parent | |
| * @return true if the new size and position are different than the | |
| * previous ones | |
| * {@hide} | |
| */ | |
| protected boolean setFrame(int left, int top, int right, int bottom) { | |
| boolean changed = false; | |
| if (DBG) { | |
| Log.d("View", this + " View.setFrame(" + left + "," + top + "," | |
| + right + "," + bottom + ")"); | |
| } | |
| if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { | |
| changed = true; | |
| // Remember our drawn bit | |
| int drawn = mPrivateFlags & PFLAG_DRAWN; | |
| int oldWidth = mRight - mLeft; | |
| int oldHeight = mBottom - mTop; | |
| int newWidth = right - left; | |
| int newHeight = bottom - top; | |
| boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); | |
| // Invalidate our old position | |
| invalidate(sizeChanged); | |
| mLeft = left; | |
| mTop = top; | |
| mRight = right; | |
| mBottom = bottom; | |
| mRenderNode.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); | |
| mPrivateFlags |= PFLAG_HAS_BOUNDS; | |
| if (sizeChanged) { | |
| sizeChange(newWidth, newHeight, oldWidth, oldHeight); | |
| } | |
| if ((mViewFlags & VISIBILITY_MASK) == VISIBLE || mGhostView != null) { | |
| // If we are visible, force the DRAWN bit to on so that | |
| // this invalidate will go through (at least to our parent). | |
| // This is because someone may have invalidated this view | |
| // before this call to setFrame came in, thereby clearing | |
| // the DRAWN bit. | |
| mPrivateFlags |= PFLAG_DRAWN; | |
| invalidate(sizeChanged); | |
| // parent display list may need to be recreated based on a change in the bounds | |
| // of any child | |
| invalidateParentCaches(); | |
| } | |
| // Reset drawn bit to original value (invalidate turns it off) | |
| mPrivateFlags |= drawn; | |
| mBackgroundSizeChanged = true; | |
| if (mForegroundInfo != null) { | |
| mForegroundInfo.mBoundsChanged = true; | |
| } | |
| notifySubtreeAccessibilityStateChangedIfNeeded(); | |
| } | |
| return changed; | |
| } | |
| /** | |
| * Same as setFrame, but public and hidden. For use in {@link android.transition.ChangeBounds}. | |
| * @hide | |
| */ | |
| public void setLeftTopRightBottom(int left, int top, int right, int bottom) { | |
| setFrame(left, top, right, bottom); | |
| } | |
| private void sizeChange(int newWidth, int newHeight, int oldWidth, int oldHeight) { | |
| onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); | |
| if (mOverlay != null) { | |
| mOverlay.getOverlayView().setRight(newWidth); | |
| mOverlay.getOverlayView().setBottom(newHeight); | |
| } | |
| rebuildOutline(); | |
| } | |
| /** | |
| * Finalize inflating a view from XML. This is called as the last phase | |
| * of inflation, after all child views have been added. | |
| * | |
| * <p>Even if the subclass overrides onFinishInflate, they should always be | |
| * sure to call the super method, so that we get called. | |
| */ | |
| @CallSuper | |
| protected void onFinishInflate() { | |
| } | |
| /** | |
| * Returns the resources associated with this view. | |
| * | |
| * @return Resources object. | |
| */ | |
| public Resources getResources() { | |
| return mResources; | |
| } | |
| /** | |
| * Invalidates the specified Drawable. | |
| * | |
| * @param drawable the drawable to invalidate | |
| */ | |
| @Override | |
| public void invalidateDrawable(@NonNull Drawable drawable) { | |
| if (verifyDrawable(drawable)) { | |
| final Rect dirty = drawable.getDirtyBounds(); | |
| final int scrollX = mScrollX; | |
| final int scrollY = mScrollY; | |
| invalidate(dirty.left + scrollX, dirty.top + scrollY, | |
| dirty.right + scrollX, dirty.bottom + scrollY); | |
| rebuildOutline(); | |
| } | |
| } | |
| /** | |
| * Schedules an action on a drawable to occur at a specified time. | |
| * | |
| * @param who the recipient of the action | |
| * @param what the action to run on the drawable | |
| * @param when the time at which the action must occur. Uses the | |
| * {@link SystemClock#uptimeMillis} timebase. | |
| */ | |
| @Override | |
| public void scheduleDrawable(Drawable who, Runnable what, long when) { | |
| if (verifyDrawable(who) && what != null) { | |
| final long delay = when - SystemClock.uptimeMillis(); | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( | |
| Choreographer.CALLBACK_ANIMATION, what, who, | |
| Choreographer.subtractFrameDelay(delay)); | |
| } else { | |
| ViewRootImpl.getRunQueue().postDelayed(what, delay); | |
| } | |
| } | |
| } | |
| /** | |
| * Cancels a scheduled action on a drawable. | |
| * | |
| * @param who the recipient of the action | |
| * @param what the action to cancel | |
| */ | |
| @Override | |
| public void unscheduleDrawable(Drawable who, Runnable what) { | |
| if (verifyDrawable(who) && what != null) { | |
| if (mAttachInfo != null) { | |
| mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( | |
| Choreographer.CALLBACK_ANIMATION, what, who); | |
| } | |
| ViewRootImpl.getRunQueue().removeCallbacks(what); | |
| } | |
| } | |
| /** | |
| * Unschedule any events associated with the given Drawable. This can be | |
| * used when selecting a new Drawable into a view, so that the previous | |
| * one is completely unscheduled. | |
| * | |
| * @param who The Drawable to unschedule. | |
| * | |
| * @see #drawableStateChanged | |
| */ | |
| public void unscheduleDrawable(Drawable who) { | |
| if (mAttachInfo != null && who != null) { | |
| mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( | |
| Choreographer.CALLBACK_ANIMATION, null, who); | |
| } | |
| } | |
| /** | |
| * Resolve the Drawables depending on the layout direction. This is implicitly supposing | |
| * that the View directionality can and will be resolved before its Drawables. | |
| * | |
| * Will call {@link View#onResolveDrawables} when resolution is done. | |
| * | |
| * @hide | |
| */ | |
| protected void resolveDrawables() { | |
| // Drawables resolution may need to happen before resolving the layout direction (which is | |
| // done only during the measure() call). | |
| // If the layout direction is not resolved yet, we cannot resolve the Drawables except in | |
| // one case: when the raw layout direction has not been defined as LAYOUT_DIRECTION_INHERIT. | |
| // So, if the raw layout direction is LAYOUT_DIRECTION_LTR or LAYOUT_DIRECTION_RTL or | |
| // LAYOUT_DIRECTION_LOCALE, we can "cheat" and we don't need to wait for the layout | |
| // direction to be resolved as its resolved value will be the same as its raw value. | |
| if (!isLayoutDirectionResolved() && | |
| getRawLayoutDirection() == View.LAYOUT_DIRECTION_INHERIT) { | |
| return; | |
| } | |
| final int layoutDirection = isLayoutDirectionResolved() ? | |
| getLayoutDirection() : getRawLayoutDirection(); | |
| if (mBackground != null) { | |
| mBackground.setLayoutDirection(layoutDirection); | |
| } | |
| if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { | |
| mForegroundInfo.mDrawable.setLayoutDirection(layoutDirection); | |
| } | |
| mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; | |
| onResolveDrawables(layoutDirection); | |
| } | |
| boolean areDrawablesResolved() { | |
| return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; | |
| } | |
| /** | |
| * Called when layout direction has been resolved. | |
| * | |
| * The default implementation does nothing. | |
| * | |
| * @param layoutDirection The resolved layout direction. | |
| * | |
| * @see #LAYOUT_DIRECTION_LTR | |
| * @see #LAYOUT_DIRECTION_RTL | |
| * | |
| * @hide | |
| */ | |
| public void onResolveDrawables(@ResolvedLayoutDir int layoutDirection) { | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected void resetResolvedDrawables() { | |
| resetResolvedDrawablesInternal(); | |
| } | |
| void resetResolvedDrawablesInternal() { | |
| mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; | |
| } | |
| /** | |
| * If your view subclass is displaying its own Drawable objects, it should | |
| * override this function and return true for any Drawable it is | |
| * displaying. This allows animations for those drawables to be | |
| * scheduled. | |
| * | |
| * <p>Be sure to call through to the super class when overriding this | |
| * function. | |
| * | |
| * @param who The Drawable to verify. Return true if it is one you are | |
| * displaying, else return the result of calling through to the | |
| * super class. | |
| * | |
| * @return boolean If true than the Drawable is being displayed in the | |
| * view; else false and it is not allowed to animate. | |
| * | |
| * @see #unscheduleDrawable(android.graphics.drawable.Drawable) | |
| * @see #drawableStateChanged() | |
| */ | |
| @CallSuper | |
| protected boolean verifyDrawable(Drawable who) { | |
| // Avoid verifying the scroll bar drawable so that we don't end up in | |
| // an invalidation loop. This effectively prevents the scroll bar | |
| // drawable from triggering invalidations and scheduling runnables. | |
| return who == mBackground || (mForegroundInfo != null && mForegroundInfo.mDrawable == who); | |
| } | |
| /** | |
| * This function is called whenever the state of the view changes in such | |
| * a way that it impacts the state of drawables being shown. | |
| * <p> | |
| * If the View has a StateListAnimator, it will also be called to run necessary state | |
| * change animations. | |
| * <p> | |
| * Be sure to call through to the superclass when overriding this function. | |
| * | |
| * @see Drawable#setState(int[]) | |
| */ | |
| @CallSuper | |
| protected void drawableStateChanged() { | |
| final int[] state = getDrawableState(); | |
| final Drawable bg = mBackground; | |
| if (bg != null && bg.isStateful()) { | |
| bg.setState(state); | |
| } | |
| final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; | |
| if (fg != null && fg.isStateful()) { | |
| fg.setState(state); | |
| } | |
| if (mScrollCache != null) { | |
| final Drawable scrollBar = mScrollCache.scrollBar; | |
| if (scrollBar != null && scrollBar.isStateful()) { | |
| scrollBar.setState(state); | |
| } | |
| } | |
| if (mStateListAnimator != null) { | |
| mStateListAnimator.setState(state); | |
| } | |
| } | |
| /** | |
| * This function is called whenever the view hotspot changes and needs to | |
| * be propagated to drawables or child views managed by the view. | |
| * <p> | |
| * Dispatching to child views is handled by | |
| * {@link #dispatchDrawableHotspotChanged(float, float)}. | |
| * <p> | |
| * Be sure to call through to the superclass when overriding this function. | |
| * | |
| * @param x hotspot x coordinate | |
| * @param y hotspot y coordinate | |
| */ | |
| @CallSuper | |
| public void drawableHotspotChanged(float x, float y) { | |
| if (mBackground != null) { | |
| mBackground.setHotspot(x, y); | |
| } | |
| if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { | |
| mForegroundInfo.mDrawable.setHotspot(x, y); | |
| } | |
| dispatchDrawableHotspotChanged(x, y); | |
| } | |
| /** | |
| * Dispatches drawableHotspotChanged to all of this View's children. | |
| * | |
| * @param x hotspot x coordinate | |
| * @param y hotspot y coordinate | |
| * @see #drawableHotspotChanged(float, float) | |
| */ | |
| public void dispatchDrawableHotspotChanged(float x, float y) { | |
| } | |
| /** | |
| * Call this to force a view to update its drawable state. This will cause | |
| * drawableStateChanged to be called on this view. Views that are interested | |
| * in the new state should call getDrawableState. | |
| * | |
| * @see #drawableStateChanged | |
| * @see #getDrawableState | |
| */ | |
| public void refreshDrawableState() { | |
| mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; | |
| drawableStateChanged(); | |
| ViewParent parent = mParent; | |
| if (parent != null) { | |
| parent.childDrawableStateChanged(this); | |
| } | |
| } | |
| /** | |
| * Return an array of resource IDs of the drawable states representing the | |
| * current state of the view. | |
| * | |
| * @return The current drawable state | |
| * | |
| * @see Drawable#setState(int[]) | |
| * @see #drawableStateChanged() | |
| * @see #onCreateDrawableState(int) | |
| */ | |
| public final int[] getDrawableState() { | |
| if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { | |
| return mDrawableState; | |
| } else { | |
| mDrawableState = onCreateDrawableState(0); | |
| mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; | |
| return mDrawableState; | |
| } | |
| } | |
| /** | |
| * Generate the new {@link android.graphics.drawable.Drawable} state for | |
| * this view. This is called by the view | |
| * system when the cached Drawable state is determined to be invalid. To | |
| * retrieve the current state, you should use {@link #getDrawableState}. | |
| * | |
| * @param extraSpace if non-zero, this is the number of extra entries you | |
| * would like in the returned array in which you can place your own | |
| * states. | |
| * | |
| * @return Returns an array holding the current {@link Drawable} state of | |
| * the view. | |
| * | |
| * @see #mergeDrawableStates(int[], int[]) | |
| */ | |
| protected int[] onCreateDrawableState(int extraSpace) { | |
| if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && | |
| mParent instanceof View) { | |
| return ((View) mParent).onCreateDrawableState(extraSpace); | |
| } | |
| int[] drawableState; | |
| int privateFlags = mPrivateFlags; | |
| int viewStateIndex = 0; | |
| if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= StateSet.VIEW_STATE_PRESSED; | |
| if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= StateSet.VIEW_STATE_ENABLED; | |
| if (isFocused()) viewStateIndex |= StateSet.VIEW_STATE_FOCUSED; | |
| if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= StateSet.VIEW_STATE_SELECTED; | |
| if (hasWindowFocus()) viewStateIndex |= StateSet.VIEW_STATE_WINDOW_FOCUSED; | |
| if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= StateSet.VIEW_STATE_ACTIVATED; | |
| if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && | |
| HardwareRenderer.isAvailable()) { | |
| // This is set if HW acceleration is requested, even if the current | |
| // process doesn't allow it. This is just to allow app preview | |
| // windows to better match their app. | |
| viewStateIndex |= StateSet.VIEW_STATE_ACCELERATED; | |
| } | |
| if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= StateSet.VIEW_STATE_HOVERED; | |
| final int privateFlags2 = mPrivateFlags2; | |
| if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) { | |
| viewStateIndex |= StateSet.VIEW_STATE_DRAG_CAN_ACCEPT; | |
| } | |
| if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) { | |
| viewStateIndex |= StateSet.VIEW_STATE_DRAG_HOVERED; | |
| } | |
| drawableState = StateSet.get(viewStateIndex); | |
| //noinspection ConstantIfStatement | |
| if (false) { | |
| Log.i("View", "drawableStateIndex=" + viewStateIndex); | |
| Log.i("View", toString() | |
| + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) | |
| + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) | |
| + " fo=" + hasFocus() | |
| + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) | |
| + " wf=" + hasWindowFocus() | |
| + ": " + Arrays.toString(drawableState)); | |
| } | |
| if (extraSpace == 0) { | |
| return drawableState; | |
| } | |
| final int[] fullState; | |
| if (drawableState != null) { | |
| fullState = new int[drawableState.length + extraSpace]; | |
| System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); | |
| } else { | |
| fullState = new int[extraSpace]; | |
| } | |
| return fullState; | |
| } | |
| /** | |
| * Merge your own state values in <var>additionalState</var> into the base | |
| * state values <var>baseState</var> that were returned by | |
| * {@link #onCreateDrawableState(int)}. | |
| * | |
| * @param baseState The base state values returned by | |
| * {@link #onCreateDrawableState(int)}, which will be modified to also hold your | |
| * own additional state values. | |
| * | |
| * @param additionalState The additional state values you would like | |
| * added to <var>baseState</var>; this array is not modified. | |
| * | |
| * @return As a convenience, the <var>baseState</var> array you originally | |
| * passed into the function is returned. | |
| * | |
| * @see #onCreateDrawableState(int) | |
| */ | |
| protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { | |
| final int N = baseState.length; | |
| int i = N - 1; | |
| while (i >= 0 && baseState[i] == 0) { | |
| i--; | |
| } | |
| System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); | |
| return baseState; | |
| } | |
| /** | |
| * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} | |
| * on all Drawable objects associated with this view. | |
| * <p> | |
| * Also calls {@link StateListAnimator#jumpToCurrentState()} if there is a StateListAnimator | |
| * attached to this view. | |
| */ | |
| @CallSuper | |
| public void jumpDrawablesToCurrentState() { | |
| if (mBackground != null) { | |
| mBackground.jumpToCurrentState(); | |
| } | |
| if (mStateListAnimator != null) { | |
| mStateListAnimator.jumpToCurrentState(); | |
| } | |
| if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { | |
| mForegroundInfo.mDrawable.jumpToCurrentState(); | |
| } | |
| } | |
| /** | |
| * Sets the background color for this view. | |
| * @param color the color of the background | |
| */ | |
| @RemotableViewMethod | |
| public void setBackgroundColor(@ColorInt int color) { | |
| if (mBackground instanceof ColorDrawable) { | |
| ((ColorDrawable) mBackground.mutate()).setColor(color); | |
| computeOpaqueFlags(); | |
| mBackgroundResource = 0; | |
| } else { | |
| setBackground(new ColorDrawable(color)); | |
| } | |
| } | |
| /** | |
| * Set the background to a given resource. The resource should refer to | |
| * a Drawable object or 0 to remove the background. | |
| * @param resid The identifier of the resource. | |
| * | |
| * @attr ref android.R.styleable#View_background | |
| */ | |
| @RemotableViewMethod | |
| public void setBackgroundResource(@DrawableRes int resid) { | |
| if (resid != 0 && resid == mBackgroundResource) { | |
| return; | |
| } | |
| Drawable d = null; | |
| if (resid != 0) { | |
| d = mContext.getDrawable(resid); | |
| } | |
| setBackground(d); | |
| mBackgroundResource = resid; | |
| } | |
| /** | |
| * Set the background to a given Drawable, or remove the background. If the | |
| * background has padding, this View's padding is set to the background's | |
| * padding. However, when a background is removed, this View's padding isn't | |
| * touched. If setting the padding is desired, please use | |
| * {@link #setPadding(int, int, int, int)}. | |
| * | |
| * @param background The Drawable to use as the background, or null to remove the | |
| * background | |
| */ | |
| public void setBackground(Drawable background) { | |
| //noinspection deprecation | |
| setBackgroundDrawable(background); | |
| } | |
| /** | |
| * @deprecated use {@link #setBackground(Drawable)} instead | |
| */ | |
| @Deprecated | |
| public void setBackgroundDrawable(Drawable background) { | |
| computeOpaqueFlags(); | |
| if (background == mBackground) { | |
| return; | |
| } | |
| boolean requestLayout = false; | |
| mBackgroundResource = 0; | |
| /* | |
| * Regardless of whether we're setting a new background or not, we want | |
| * to clear the previous drawable. | |
| */ | |
| if (mBackground != null) { | |
| mBackground.setCallback(null); | |
| unscheduleDrawable(mBackground); | |
| } | |
| if (background != null) { | |
| Rect padding = sThreadLocal.get(); | |
| if (padding == null) { | |
| padding = new Rect(); | |
| sThreadLocal.set(padding); | |
| } | |
| resetResolvedDrawablesInternal(); | |
| background.setLayoutDirection(getLayoutDirection()); | |
| if (background.getPadding(padding)) { | |
| resetResolvedPaddingInternal(); | |
| switch (background.getLayoutDirection()) { | |
| case LAYOUT_DIRECTION_RTL: | |
| mUserPaddingLeftInitial = padding.right; | |
| mUserPaddingRightInitial = padding.left; | |
| internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); | |
| break; | |
| case LAYOUT_DIRECTION_LTR: | |
| default: | |
| mUserPaddingLeftInitial = padding.left; | |
| mUserPaddingRightInitial = padding.right; | |
| internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); | |
| } | |
| mLeftPaddingDefined = false; | |
| mRightPaddingDefined = false; | |
| } | |
| // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or | |
| // if it has a different minimum size, we should layout again | |
| if (mBackground == null | |
| || mBackground.getMinimumHeight() != background.getMinimumHeight() | |
| || mBackground.getMinimumWidth() != background.getMinimumWidth()) { | |
| requestLayout = true; | |
| } | |
| background.setCallback(this); | |
| if (background.isStateful()) { | |
| background.setState(getDrawableState()); | |
| } | |
| background.setVisible(getVisibility() == VISIBLE, false); | |
| mBackground = background; | |
| applyBackgroundTint(); | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { | |
| mPrivateFlags &= ~PFLAG_SKIP_DRAW; | |
| requestLayout = true; | |
| } | |
| } else { | |
| /* Remove the background */ | |
| mBackground = null; | |
| if ((mViewFlags & WILL_NOT_DRAW) != 0 | |
| && (mForegroundInfo == null || mForegroundInfo.mDrawable == null)) { | |
| mPrivateFlags |= PFLAG_SKIP_DRAW; | |
| } | |
| /* | |
| * When the background is set, we try to apply its padding to this | |
| * View. When the background is removed, we don't touch this View's | |
| * padding. This is noted in the Javadocs. Hence, we don't need to | |
| * requestLayout(), the invalidate() below is sufficient. | |
| */ | |
| // The old background's minimum size could have affected this | |
| // View's layout, so let's requestLayout | |
| requestLayout = true; | |
| } | |
| computeOpaqueFlags(); | |
| if (requestLayout) { | |
| requestLayout(); | |
| } | |
| mBackgroundSizeChanged = true; | |
| invalidate(true); | |
| } | |
| /** | |
| * Gets the background drawable | |
| * | |
| * @return The drawable used as the background for this view, if any. | |
| * | |
| * @see #setBackground(Drawable) | |
| * | |
| * @attr ref android.R.styleable#View_background | |
| */ | |
| public Drawable getBackground() { | |
| return mBackground; | |
| } | |
| /** | |
| * Applies a tint to the background drawable. Does not modify the current tint | |
| * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. | |
| * <p> | |
| * Subsequent calls to {@link #setBackground(Drawable)} will automatically | |
| * mutate the drawable and apply the specified tint and tint mode using | |
| * {@link Drawable#setTintList(ColorStateList)}. | |
| * | |
| * @param tint the tint to apply, may be {@code null} to clear tint | |
| * | |
| * @attr ref android.R.styleable#View_backgroundTint | |
| * @see #getBackgroundTintList() | |
| * @see Drawable#setTintList(ColorStateList) | |
| */ | |
| public void setBackgroundTintList(@Nullable ColorStateList tint) { | |
| if (mBackgroundTint == null) { | |
| mBackgroundTint = new TintInfo(); | |
| } | |
| mBackgroundTint.mTintList = tint; | |
| mBackgroundTint.mHasTintList = true; | |
| applyBackgroundTint(); | |
| } | |
| /** | |
| * Return the tint applied to the background drawable, if specified. | |
| * | |
| * @return the tint applied to the background drawable | |
| * @attr ref android.R.styleable#View_backgroundTint | |
| * @see #setBackgroundTintList(ColorStateList) | |
| */ | |
| @Nullable | |
| public ColorStateList getBackgroundTintList() { | |
| return mBackgroundTint != null ? mBackgroundTint.mTintList : null; | |
| } | |
| /** | |
| * Specifies the blending mode used to apply the tint specified by | |
| * {@link #setBackgroundTintList(ColorStateList)}} to the background | |
| * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. | |
| * | |
| * @param tintMode the blending mode used to apply the tint, may be | |
| * {@code null} to clear tint | |
| * @attr ref android.R.styleable#View_backgroundTintMode | |
| * @see #getBackgroundTintMode() | |
| * @see Drawable#setTintMode(PorterDuff.Mode) | |
| */ | |
| public void setBackgroundTintMode(@Nullable PorterDuff.Mode tintMode) { | |
| if (mBackgroundTint == null) { | |
| mBackgroundTint = new TintInfo(); | |
| } | |
| mBackgroundTint.mTintMode = tintMode; | |
| mBackgroundTint.mHasTintMode = true; | |
| applyBackgroundTint(); | |
| } | |
| /** | |
| * Return the blending mode used to apply the tint to the background | |
| * drawable, if specified. | |
| * | |
| * @return the blending mode used to apply the tint to the background | |
| * drawable | |
| * @attr ref android.R.styleable#View_backgroundTintMode | |
| * @see #setBackgroundTintMode(PorterDuff.Mode) | |
| */ | |
| @Nullable | |
| public PorterDuff.Mode getBackgroundTintMode() { | |
| return mBackgroundTint != null ? mBackgroundTint.mTintMode : null; | |
| } | |
| private void applyBackgroundTint() { | |
| if (mBackground != null && mBackgroundTint != null) { | |
| final TintInfo tintInfo = mBackgroundTint; | |
| if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { | |
| mBackground = mBackground.mutate(); | |
| if (tintInfo.mHasTintList) { | |
| mBackground.setTintList(tintInfo.mTintList); | |
| } | |
| if (tintInfo.mHasTintMode) { | |
| mBackground.setTintMode(tintInfo.mTintMode); | |
| } | |
| // The drawable (or one of its children) may not have been | |
| // stateful before applying the tint, so let's try again. | |
| if (mBackground.isStateful()) { | |
| mBackground.setState(getDrawableState()); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Returns the drawable used as the foreground of this View. The | |
| * foreground drawable, if non-null, is always drawn on top of the view's content. | |
| * | |
| * @return a Drawable or null if no foreground was set | |
| * | |
| * @see #onDrawForeground(Canvas) | |
| */ | |
| public Drawable getForeground() { | |
| return mForegroundInfo != null ? mForegroundInfo.mDrawable : null; | |
| } | |
| /** | |
| * Supply a Drawable that is to be rendered on top of all of the content in the view. | |
| * | |
| * @param foreground the Drawable to be drawn on top of the children | |
| * | |
| * @attr ref android.R.styleable#View_foreground | |
| */ | |
| public void setForeground(Drawable foreground) { | |
| if (mForegroundInfo == null) { | |
| if (foreground == null) { | |
| // Nothing to do. | |
| return; | |
| } | |
| mForegroundInfo = new ForegroundInfo(); | |
| } | |
| if (foreground == mForegroundInfo.mDrawable) { | |
| // Nothing to do | |
| return; | |
| } | |
| if (mForegroundInfo.mDrawable != null) { | |
| mForegroundInfo.mDrawable.setCallback(null); | |
| unscheduleDrawable(mForegroundInfo.mDrawable); | |
| } | |
| mForegroundInfo.mDrawable = foreground; | |
| mForegroundInfo.mBoundsChanged = true; | |
| if (foreground != null) { | |
| if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { | |
| mPrivateFlags &= ~PFLAG_SKIP_DRAW; | |
| } | |
| foreground.setCallback(this); | |
| foreground.setLayoutDirection(getLayoutDirection()); | |
| if (foreground.isStateful()) { | |
| foreground.setState(getDrawableState()); | |
| } | |
| applyForegroundTint(); | |
| } else if ((mViewFlags & WILL_NOT_DRAW) != 0 && mBackground == null) { | |
| mPrivateFlags |= PFLAG_SKIP_DRAW; | |
| } | |
| requestLayout(); | |
| invalidate(); | |
| } | |
| /** | |
| * Magic bit used to support features of framework-internal window decor implementation details. | |
| * This used to live exclusively in FrameLayout. | |
| * | |
| * @return true if the foreground should draw inside the padding region or false | |
| * if it should draw inset by the view's padding | |
| * @hide internal use only; only used by FrameLayout and internal screen layouts. | |
| */ | |
| public boolean isForegroundInsidePadding() { | |
| return mForegroundInfo != null ? mForegroundInfo.mInsidePadding : true; | |
| } | |
| /** | |
| * Describes how the foreground is positioned. | |
| * | |
| * @return foreground gravity. | |
| * | |
| * @see #setForegroundGravity(int) | |
| * | |
| * @attr ref android.R.styleable#View_foregroundGravity | |
| */ | |
| public int getForegroundGravity() { | |
| return mForegroundInfo != null ? mForegroundInfo.mGravity | |
| : Gravity.START | Gravity.TOP; | |
| } | |
| /** | |
| * Describes how the foreground is positioned. Defaults to START and TOP. | |
| * | |
| * @param gravity see {@link android.view.Gravity} | |
| * | |
| * @see #getForegroundGravity() | |
| * | |
| * @attr ref android.R.styleable#View_foregroundGravity | |
| */ | |
| public void setForegroundGravity(int gravity) { | |
| if (mForegroundInfo == null) { | |
| mForegroundInfo = new ForegroundInfo(); | |
| } | |
| if (mForegroundInfo.mGravity != gravity) { | |
| if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) { | |
| gravity |= Gravity.START; | |
| } | |
| if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { | |
| gravity |= Gravity.TOP; | |
| } | |
| mForegroundInfo.mGravity = gravity; | |
| requestLayout(); | |
| } | |
| } | |
| /** | |
| * Applies a tint to the foreground drawable. Does not modify the current tint | |
| * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. | |
| * <p> | |
| * Subsequent calls to {@link #setForeground(Drawable)} will automatically | |
| * mutate the drawable and apply the specified tint and tint mode using | |
| * {@link Drawable#setTintList(ColorStateList)}. | |
| * | |
| * @param tint the tint to apply, may be {@code null} to clear tint | |
| * | |
| * @attr ref android.R.styleable#View_foregroundTint | |
| * @see #getForegroundTintList() | |
| * @see Drawable#setTintList(ColorStateList) | |
| */ | |
| public void setForegroundTintList(@Nullable ColorStateList tint) { | |
| if (mForegroundInfo == null) { | |
| mForegroundInfo = new ForegroundInfo(); | |
| } | |
| if (mForegroundInfo.mTintInfo == null) { | |
| mForegroundInfo.mTintInfo = new TintInfo(); | |
| } | |
| mForegroundInfo.mTintInfo.mTintList = tint; | |
| mForegroundInfo.mTintInfo.mHasTintList = true; | |
| applyForegroundTint(); | |
| } | |
| /** | |
| * Return the tint applied to the foreground drawable, if specified. | |
| * | |
| * @return the tint applied to the foreground drawable | |
| * @attr ref android.R.styleable#View_foregroundTint | |
| * @see #setForegroundTintList(ColorStateList) | |
| */ | |
| @Nullable | |
| public ColorStateList getForegroundTintList() { | |
| return mForegroundInfo != null && mForegroundInfo.mTintInfo != null | |
| ? mForegroundInfo.mTintInfo.mTintList : null; | |
| } | |
| /** | |
| * Specifies the blending mode used to apply the tint specified by | |
| * {@link #setForegroundTintList(ColorStateList)}} to the background | |
| * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. | |
| * | |
| * @param tintMode the blending mode used to apply the tint, may be | |
| * {@code null} to clear tint | |
| * @attr ref android.R.styleable#View_foregroundTintMode | |
| * @see #getForegroundTintMode() | |
| * @see Drawable#setTintMode(PorterDuff.Mode) | |
| */ | |
| public void setForegroundTintMode(@Nullable PorterDuff.Mode tintMode) { | |
| if (mForegroundInfo == null) { | |
| mForegroundInfo = new ForegroundInfo(); | |
| } | |
| if (mForegroundInfo.mTintInfo == null) { | |
| mForegroundInfo.mTintInfo = new TintInfo(); | |
| } | |
| mForegroundInfo.mTintInfo.mTintMode = tintMode; | |
| mForegroundInfo.mTintInfo.mHasTintMode = true; | |
| applyForegroundTint(); | |
| } | |
| /** | |
| * Return the blending mode used to apply the tint to the foreground | |
| * drawable, if specified. | |
| * | |
| * @return the blending mode used to apply the tint to the foreground | |
| * drawable | |
| * @attr ref android.R.styleable#View_foregroundTintMode | |
| * @see #setForegroundTintMode(PorterDuff.Mode) | |
| */ | |
| @Nullable | |
| public PorterDuff.Mode getForegroundTintMode() { | |
| return mForegroundInfo != null && mForegroundInfo.mTintInfo != null | |
| ? mForegroundInfo.mTintInfo.mTintMode : null; | |
| } | |
| private void applyForegroundTint() { | |
| if (mForegroundInfo != null && mForegroundInfo.mDrawable != null | |
| && mForegroundInfo.mTintInfo != null) { | |
| final TintInfo tintInfo = mForegroundInfo.mTintInfo; | |
| if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { | |
| mForegroundInfo.mDrawable = mForegroundInfo.mDrawable.mutate(); | |
| if (tintInfo.mHasTintList) { | |
| mForegroundInfo.mDrawable.setTintList(tintInfo.mTintList); | |
| } | |
| if (tintInfo.mHasTintMode) { | |
| mForegroundInfo.mDrawable.setTintMode(tintInfo.mTintMode); | |
| } | |
| // The drawable (or one of its children) may not have been | |
| // stateful before applying the tint, so let's try again. | |
| if (mForegroundInfo.mDrawable.isStateful()) { | |
| mForegroundInfo.mDrawable.setState(getDrawableState()); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Draw any foreground content for this view. | |
| * | |
| * <p>Foreground content may consist of scroll bars, a {@link #setForeground foreground} | |
| * drawable or other view-specific decorations. The foreground is drawn on top of the | |
| * primary view content.</p> | |
| * | |
| * @param canvas canvas to draw into | |
| */ | |
| public void onDrawForeground(Canvas canvas) { | |
| onDrawScrollIndicators(canvas); | |
| onDrawScrollBars(canvas); | |
| final Drawable foreground = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; | |
| if (foreground != null) { | |
| if (mForegroundInfo.mBoundsChanged) { | |
| mForegroundInfo.mBoundsChanged = false; | |
| final Rect selfBounds = mForegroundInfo.mSelfBounds; | |
| final Rect overlayBounds = mForegroundInfo.mOverlayBounds; | |
| if (mForegroundInfo.mInsidePadding) { | |
| selfBounds.set(0, 0, getWidth(), getHeight()); | |
| } else { | |
| selfBounds.set(getPaddingLeft(), getPaddingTop(), | |
| getWidth() - getPaddingRight(), getHeight() - getPaddingBottom()); | |
| } | |
| final int ld = getLayoutDirection(); | |
| Gravity.apply(mForegroundInfo.mGravity, foreground.getIntrinsicWidth(), | |
| foreground.getIntrinsicHeight(), selfBounds, overlayBounds, ld); | |
| foreground.setBounds(overlayBounds); | |
| } | |
| foreground.draw(canvas); | |
| } | |
| } | |
| /** | |
| * Sets the padding. The view may add on the space required to display | |
| * the scrollbars, depending on the style and visibility of the scrollbars. | |
| * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, | |
| * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different | |
| * from the values set in this call. | |
| * | |
| * @attr ref android.R.styleable#View_padding | |
| * @attr ref android.R.styleable#View_paddingBottom | |
| * @attr ref android.R.styleable#View_paddingLeft | |
| * @attr ref android.R.styleable#View_paddingRight | |
| * @attr ref android.R.styleable#View_paddingTop | |
| * @param left the left padding in pixels | |
| * @param top the top padding in pixels | |
| * @param right the right padding in pixels | |
| * @param bottom the bottom padding in pixels | |
| */ | |
| public void setPadding(int left, int top, int right, int bottom) { | |
| resetResolvedPaddingInternal(); | |
| mUserPaddingStart = UNDEFINED_PADDING; | |
| mUserPaddingEnd = UNDEFINED_PADDING; | |
| mUserPaddingLeftInitial = left; | |
| mUserPaddingRightInitial = right; | |
| mLeftPaddingDefined = true; | |
| mRightPaddingDefined = true; | |
| internalSetPadding(left, top, right, bottom); | |
| } | |
| /** | |
| * @hide | |
| */ | |
| protected void internalSetPadding(int left, int top, int right, int bottom) { | |
| mUserPaddingLeft = left; | |
| mUserPaddingRight = right; | |
| mUserPaddingBottom = bottom; | |
| final int viewFlags = mViewFlags; | |
| boolean changed = false; | |
| // Common case is there are no scroll bars. | |
| if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { | |
| if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { | |
| final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 | |
| ? 0 : getVerticalScrollbarWidth(); | |
| switch (mVerticalScrollbarPosition) { | |
| case SCROLLBAR_POSITION_DEFAULT: | |
| if (isLayoutRtl()) { | |
| left += offset; | |
| } else { | |
| right += offset; | |
| } | |
| break; | |
| case SCROLLBAR_POSITION_RIGHT: | |
| right += offset; | |
| break; | |
| case SCROLLBAR_POSITION_LEFT: | |
| left += offset; | |
| break; | |
| } | |
| } | |
| if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { | |
| bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 | |
| ? 0 : getHorizontalScrollbarHeight(); | |
| } | |
| } | |
| if (mPaddingLeft != left) { | |
| changed = true; | |
| mPaddingLeft = left; | |
| } | |
| if (mPaddingTop != top) { | |
| changed = true; | |
| mPaddingTop = top; | |
| } | |
| if (mPaddingRight != right) { | |
| changed = true; | |
| mPaddingRight = right; | |
| } | |
| if (mPaddingBottom != bottom) { | |
| changed = true; | |
| mPaddingBottom = bottom; | |
| } | |
| if (changed) { | |
| requestLayout(); | |
| invalidateOutline(); | |
| } | |
| } | |
| /** | |
| * Sets the relative padding. The view may add on the space required to display | |
| * the scrollbars, depending on the style and visibility of the scrollbars. | |
| * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, | |
| * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different | |
| * from the values set in this call. | |
| * | |
| * @attr ref android.R.styleable#View_padding | |
| * @attr ref android.R.styleable#View_paddingBottom | |
| * @attr ref android.R.styleable#View_paddingStart | |
| * @attr ref android.R.styleable#View_paddingEnd | |
| * @attr ref android.R.styleable#View_paddingTop | |
| * @param start the start padding in pixels | |
| * @param top the top padding in pixels | |
| * @param end the end padding in pixels | |
| * @param bottom the bottom padding in pixels | |
| */ | |
| public void setPaddingRelative(int start, int top, int end, int bottom) { | |
| resetResolvedPaddingInternal(); | |
| mUserPaddingStart = start; | |
| mUserPaddingEnd = end; | |
| mLeftPaddingDefined = true; | |
| mRightPaddingDefined = true; | |
| switch(getLayoutDirection()) { | |
| case LAYOUT_DIRECTION_RTL: | |
| mUserPaddingLeftInitial = end; | |
| mUserPaddingRightInitial = start; | |
| internalSetPadding(end, top, start, bottom); | |
| break; | |
| case LAYOUT_DIRECTION_LTR: | |
| default: | |
| mUserPaddingLeftInitial = start; | |
| mUserPaddingRightInitial = end; | |
| internalSetPadding(start, top, end, bottom); | |
| } | |
| } | |
| /** | |
| * Returns the top padding of this view. | |
| * | |
| * @return the top padding in pixels | |
| */ | |
| public int getPaddingTop() { | |
| return mPaddingTop; | |
| } | |
| /** | |
| * Returns the bottom padding of this view. If there are inset and enabled | |
| * scrollbars, this value may include the space required to display the | |
| * scrollbars as well. | |
| * | |
| * @return the bottom padding in pixels | |
| */ | |
| public int getPaddingBottom() { | |
| return mPaddingBottom; | |
| } | |
| /** | |
| * Returns the left padding of this view. If there are inset and enabled | |
| * scrollbars, this value may include the space required to display the | |
| * scrollbars as well. | |
| * | |
| * @return the left padding in pixels | |
| */ | |
| public int getPaddingLeft() { | |
| if (!isPaddingResolved()) { | |
| resolvePadding(); | |
| } | |
| return mPaddingLeft; | |
| } | |
| /** | |
| * Returns the start padding of this view depending on its resolved layout direction. | |
| * If there are inset and enabled scrollbars, this value may include the space | |
| * required to display the scrollbars as well. | |
| * | |
| * @return the start padding in pixels | |
| */ | |
| public int getPaddingStart() { | |
| if (!isPaddingResolved()) { | |
| resolvePadding(); | |
| } | |
| return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? | |
| mPaddingRight : mPaddingLeft; | |
| } | |
| /** | |
| * Returns the right padding of this view. If there are inset and enabled | |
| * scrollbars, this value may include the space required to display the | |
| * scrollbars as well. | |
| * | |
| * @return the right padding in pixels | |
| */ | |
| public int getPaddingRight() { | |
| if (!isPaddingResolved()) { | |
| resolvePadding(); | |
| } | |
| return mPaddingRight; | |
| } | |
| /** | |
| * Returns the end padding of this view depending on its resolved layout direction. | |
| * If there are inset and enabled scrollbars, this value may include the space | |
| * required to display the scrollbars as well. | |
| * | |
| * @return the end padding in pixels | |
| */ | |
| public int getPaddingEnd() { | |
| if (!isPaddingResolved()) { | |
| resolvePadding(); | |
| } | |
| return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? | |
| mPaddingLeft : mPaddingRight; | |
| } | |
| /** | |
| * Return if the padding has been set through relative values | |
| * {@link #setPaddingRelative(int, int, int, int)} or through | |
| * @attr ref android.R.styleable#View_paddingStart or | |
| * @attr ref android.R.styleable#View_paddingEnd | |
| * | |
| * @return true if the padding is relative or false if it is not. | |
| */ | |
| public boolean isPaddingRelative() { | |
| return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); | |
| } | |
| Insets computeOpticalInsets() { | |
| return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public void resetPaddingToInitialValues() { | |
| if (isRtlCompatibilityMode()) { | |
| mPaddingLeft = mUserPaddingLeftInitial; | |
| mPaddingRight = mUserPaddingRightInitial; | |
| return; | |
| } | |
| if (isLayoutRtl()) { | |
| mPaddingLeft = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingLeftInitial; | |
| mPaddingRight = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingRightInitial; | |
| } else { | |
| mPaddingLeft = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingLeftInitial; | |
| mPaddingRight = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingRightInitial; | |
| } | |
| } | |
| /** | |
| * @hide | |
| */ | |
| public Insets getOpticalInsets() { | |
| if (mLayoutInsets == null) { | |
| mLayoutInsets = computeOpticalInsets(); | |
| } | |
| return mLayoutInsets; | |
| } | |
| /** | |
| * Set this view's optical insets. | |
| * | |
| * <p>This method should be treated similarly to setMeasuredDimension and not as a general | |
| * property. Views that compute their own optical insets should call it as part of measurement. | |
| * This method does not request layout. If you are setting optical insets outside of | |
| * measure/layout itself you will want to call requestLayout() yourself. | |
| * </p> | |
| * @hide | |
| */ | |
| public void setOpticalInsets(Insets insets) { | |
| mLayoutInsets = insets; | |
| } | |
| /** | |
| * Changes the selection state of this view. A view can be selected or not. | |
| * Note that selection is not the same as focus. Views are typically | |
| * selected in the context of an AdapterView like ListView or GridView; | |
| * the selected view is the view that is highlighted. | |
| * | |
| * @param selected true if the view must be selected, false otherwise | |
| */ | |
| public void setSelected(boolean selected) { | |
| //noinspection DoubleNegation | |
| if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { | |
| mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); | |
| if (!selected) resetPressedState(); | |
| invalidate(true); | |
| refreshDrawableState(); | |
| dispatchSetSelected(selected); | |
| if (selected) { | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); | |
| } else { | |
| notifyViewAccessibilityStateChangedIfNeeded( | |
| AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); | |
| } | |
| } | |
| } | |
| /** | |
| * Dispatch setSelected to all of this View's children. | |
| * | |
| * @see #setSelected(boolean) | |
| * | |
| * @param selected The new selected state | |
| */ | |
| protected void dispatchSetSelected(boolean selected) { | |
| } | |
| /** | |
| * Indicates the selection state of this view. | |
| * | |
| * @return true if the view is selected, false otherwise | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isSelected() { | |
| return (mPrivateFlags & PFLAG_SELECTED) != 0; | |
| } | |
| /** | |
| * Changes the activated state of this view. A view can be activated or not. | |
| * Note that activation is not the same as selection. Selection is | |
| * a transient property, representing the view (hierarchy) the user is | |
| * currently interacting with. Activation is a longer-term state that the | |
| * user can move views in and out of. For example, in a list view with | |
| * single or multiple selection enabled, the views in the current selection | |
| * set are activated. (Um, yeah, we are deeply sorry about the terminology | |
| * here.) The activated state is propagated down to children of the view it | |
| * is set on. | |
| * | |
| * @param activated true if the view must be activated, false otherwise | |
| */ | |
| public void setActivated(boolean activated) { | |
| //noinspection DoubleNegation | |
| if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { | |
| mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); | |
| invalidate(true); | |
| refreshDrawableState(); | |
| dispatchSetActivated(activated); | |
| } | |
| } | |
| /** | |
| * Dispatch setActivated to all of this View's children. | |
| * | |
| * @see #setActivated(boolean) | |
| * | |
| * @param activated The new activated state | |
| */ | |
| protected void dispatchSetActivated(boolean activated) { | |
| } | |
| /** | |
| * Indicates the activation state of this view. | |
| * | |
| * @return true if the view is activated, false otherwise | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public boolean isActivated() { | |
| return (mPrivateFlags & PFLAG_ACTIVATED) != 0; | |
| } | |
| /** | |
| * Returns the ViewTreeObserver for this view's hierarchy. The view tree | |
| * observer can be used to get notifications when global events, like | |
| * layout, happen. | |
| * | |
| * The returned ViewTreeObserver observer is not guaranteed to remain | |
| * valid for the lifetime of this View. If the caller of this method keeps | |
| * a long-lived reference to ViewTreeObserver, it should always check for | |
| * the return value of {@link ViewTreeObserver#isAlive()}. | |
| * | |
| * @return The ViewTreeObserver for this view's hierarchy. | |
| */ | |
| public ViewTreeObserver getViewTreeObserver() { | |
| if (mAttachInfo != null) { | |
| return mAttachInfo.mTreeObserver; | |
| } | |
| if (mFloatingTreeObserver == null) { | |
| mFloatingTreeObserver = new ViewTreeObserver(); | |
| } | |
| return mFloatingTreeObserver; | |
| } | |
| /** | |
| * <p>Finds the topmost view in the current view hierarchy.</p> | |
| * | |
| * @return the topmost view containing this view | |
| */ | |
| public View getRootView() { | |
| if (mAttachInfo != null) { | |
| final View v = mAttachInfo.mRootView; | |
| if (v != null) { | |
| return v; | |
| } | |
| } | |
| View parent = this; | |
| while (parent.mParent != null && parent.mParent instanceof View) { | |
| parent = (View) parent.mParent; | |
| } | |
| return parent; | |
| } | |
| /** | |
| * Transforms a motion event from view-local coordinates to on-screen | |
| * coordinates. | |
| * | |
| * @param ev the view-local motion event | |
| * @return false if the transformation could not be applied | |
| * @hide | |
| */ | |
| public boolean toGlobalMotionEvent(MotionEvent ev) { | |
| final AttachInfo info = mAttachInfo; | |
| if (info == null) { | |
| return false; | |
| } | |
| final Matrix m = info.mTmpMatrix; | |
| m.set(Matrix.IDENTITY_MATRIX); | |
| transformMatrixToGlobal(m); | |
| ev.transform(m); | |
| return true; | |
| } | |
| /** | |
| * Transforms a motion event from on-screen coordinates to view-local | |
| * coordinates. | |
| * | |
| * @param ev the on-screen motion event | |
| * @return false if the transformation could not be applied | |
| * @hide | |
| */ | |
| public boolean toLocalMotionEvent(MotionEvent ev) { | |
| final AttachInfo info = mAttachInfo; | |
| if (info == null) { | |
| return false; | |
| } | |
| final Matrix m = info.mTmpMatrix; | |
| m.set(Matrix.IDENTITY_MATRIX); | |
| transformMatrixToLocal(m); | |
| ev.transform(m); | |
| return true; | |
| } | |
| /** | |
| * Modifies the input matrix such that it maps view-local coordinates to | |
| * on-screen coordinates. | |
| * | |
| * @param m input matrix to modify | |
| * @hide | |
| */ | |
| public void transformMatrixToGlobal(Matrix m) { | |
| final ViewParent parent = mParent; | |
| if (parent instanceof View) { | |
| final View vp = (View) parent; | |
| vp.transformMatrixToGlobal(m); | |
| m.preTranslate(-vp.mScrollX, -vp.mScrollY); | |
| } else if (parent instanceof ViewRootImpl) { | |
| final ViewRootImpl vr = (ViewRootImpl) parent; | |
| vr.transformMatrixToGlobal(m); | |
| m.preTranslate(0, -vr.mCurScrollY); | |
| } | |
| m.preTranslate(mLeft, mTop); | |
| if (!hasIdentityMatrix()) { | |
| m.preConcat(getMatrix()); | |
| } | |
| } | |
| /** | |
| * Modifies the input matrix such that it maps on-screen coordinates to | |
| * view-local coordinates. | |
| * | |
| * @param m input matrix to modify | |
| * @hide | |
| */ | |
| public void transformMatrixToLocal(Matrix m) { | |
| final ViewParent parent = mParent; | |
| if (parent instanceof View) { | |
| final View vp = (View) parent; | |
| vp.transformMatrixToLocal(m); | |
| m.postTranslate(vp.mScrollX, vp.mScrollY); | |
| } else if (parent instanceof ViewRootImpl) { | |
| final ViewRootImpl vr = (ViewRootImpl) parent; | |
| vr.transformMatrixToLocal(m); | |
| m.postTranslate(0, vr.mCurScrollY); | |
| } | |
| m.postTranslate(-mLeft, -mTop); | |
| if (!hasIdentityMatrix()) { | |
| m.postConcat(getInverseMatrix()); | |
| } | |
| } | |
| /** | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout", indexMapping = { | |
| @ViewDebug.IntToString(from = 0, to = "x"), | |
| @ViewDebug.IntToString(from = 1, to = "y") | |
| }) | |
| public int[] getLocationOnScreen() { | |
| int[] location = new int[2]; | |
| getLocationOnScreen(location); | |
| return location; | |
| } | |
| /** | |
| * <p>Computes the coordinates of this view on the screen. The argument | |
| * must be an array of two integers. After the method returns, the array | |
| * contains the x and y location in that order.</p> | |
| * | |
| * @param location an array of two integers in which to hold the coordinates | |
| */ | |
| public void getLocationOnScreen(@Size(2) int[] location) { | |
| getLocationInWindow(location); | |
| final AttachInfo info = mAttachInfo; | |
| if (info != null) { | |
| location[0] += info.mWindowLeft; | |
| location[1] += info.mWindowTop; | |
| } | |
| } | |
| /** | |
| * <p>Computes the coordinates of this view in its window. The argument | |
| * must be an array of two integers. After the method returns, the array | |
| * contains the x and y location in that order.</p> | |
| * | |
| * @param location an array of two integers in which to hold the coordinates | |
| */ | |
| public void getLocationInWindow(@Size(2) int[] location) { | |
| if (location == null || location.length < 2) { | |
| throw new IllegalArgumentException("location must be an array of two integers"); | |
| } | |
| if (mAttachInfo == null) { | |
| // When the view is not attached to a window, this method does not make sense | |
| location[0] = location[1] = 0; | |
| return; | |
| } | |
| float[] position = mAttachInfo.mTmpTransformLocation; | |
| position[0] = position[1] = 0.0f; | |
| if (!hasIdentityMatrix()) { | |
| getMatrix().mapPoints(position); | |
| } | |
| position[0] += mLeft; | |
| position[1] += mTop; | |
| ViewParent viewParent = mParent; | |
| while (viewParent instanceof View) { | |
| final View view = (View) viewParent; | |
| position[0] -= view.mScrollX; | |
| position[1] -= view.mScrollY; | |
| if (!view.hasIdentityMatrix()) { | |
| view.getMatrix().mapPoints(position); | |
| } | |
| position[0] += view.mLeft; | |
| position[1] += view.mTop; | |
| viewParent = view.mParent; | |
| } | |
| if (viewParent instanceof ViewRootImpl) { | |
| // *cough* | |
| final ViewRootImpl vr = (ViewRootImpl) viewParent; | |
| position[1] -= vr.mCurScrollY; | |
| } | |
| location[0] = (int) (position[0] + 0.5f); | |
| location[1] = (int) (position[1] + 0.5f); | |
| } | |
| /** | |
| * {@hide} | |
| * @param id the id of the view to be found | |
| * @return the view of the specified id, null if cannot be found | |
| */ | |
| protected View findViewTraversal(@IdRes int id) { | |
| if (id == mID) { | |
| return this; | |
| } | |
| return null; | |
| } | |
| /** | |
| * {@hide} | |
| * @param tag the tag of the view to be found | |
| * @return the view of specified tag, null if cannot be found | |
| */ | |
| protected View findViewWithTagTraversal(Object tag) { | |
| if (tag != null && tag.equals(mTag)) { | |
| return this; | |
| } | |
| return null; | |
| } | |
| /** | |
| * {@hide} | |
| * @param predicate The predicate to evaluate. | |
| * @param childToSkip If not null, ignores this child during the recursive traversal. | |
| * @return The first view that matches the predicate or null. | |
| */ | |
| protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { | |
| if (predicate.apply(this)) { | |
| return this; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Look for a child view with the given id. If this view has the given | |
| * id, return this view. | |
| * | |
| * @param id The id to search for. | |
| * @return The view that has the given id in the hierarchy or null | |
| */ | |
| @Nullable | |
| public final View findViewById(@IdRes int id) { | |
| if (id < 0) { | |
| return null; | |
| } | |
| return findViewTraversal(id); | |
| } | |
| /** | |
| * Finds a view by its unuque and stable accessibility id. | |
| * | |
| * @param accessibilityId The searched accessibility id. | |
| * @return The found view. | |
| */ | |
| final View findViewByAccessibilityId(int accessibilityId) { | |
| if (accessibilityId < 0) { | |
| return null; | |
| } | |
| View view = findViewByAccessibilityIdTraversal(accessibilityId); | |
| if (view != null) { | |
| return view.includeForAccessibility() ? view : null; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Performs the traversal to find a view by its unuque and stable accessibility id. | |
| * | |
| * <strong>Note:</strong>This method does not stop at the root namespace | |
| * boundary since the user can touch the screen at an arbitrary location | |
| * potentially crossing the root namespace bounday which will send an | |
| * accessibility event to accessibility services and they should be able | |
| * to obtain the event source. Also accessibility ids are guaranteed to be | |
| * unique in the window. | |
| * | |
| * @param accessibilityId The accessibility id. | |
| * @return The found view. | |
| * | |
| * @hide | |
| */ | |
| public View findViewByAccessibilityIdTraversal(int accessibilityId) { | |
| if (getAccessibilityViewId() == accessibilityId) { | |
| return this; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Look for a child view with the given tag. If this view has the given | |
| * tag, return this view. | |
| * | |
| * @param tag The tag to search for, using "tag.equals(getTag())". | |
| * @return The View that has the given tag in the hierarchy or null | |
| */ | |
| public final View findViewWithTag(Object tag) { | |
| if (tag == null) { | |
| return null; | |
| } | |
| return findViewWithTagTraversal(tag); | |
| } | |
| /** | |
| * {@hide} | |
| * Look for a child view that matches the specified predicate. | |
| * If this view matches the predicate, return this view. | |
| * | |
| * @param predicate The predicate to evaluate. | |
| * @return The first view that matches the predicate or null. | |
| */ | |
| public final View findViewByPredicate(Predicate<View> predicate) { | |
| return findViewByPredicateTraversal(predicate, null); | |
| } | |
| /** | |
| * {@hide} | |
| * Look for a child view that matches the specified predicate, | |
| * starting with the specified view and its descendents and then | |
| * recusively searching the ancestors and siblings of that view | |
| * until this view is reached. | |
| * | |
| * This method is useful in cases where the predicate does not match | |
| * a single unique view (perhaps multiple views use the same id) | |
| * and we are trying to find the view that is "closest" in scope to the | |
| * starting view. | |
| * | |
| * @param start The view to start from. | |
| * @param predicate The predicate to evaluate. | |
| * @return The first view that matches the predicate or null. | |
| */ | |
| public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { | |
| View childToSkip = null; | |
| for (;;) { | |
| View view = start.findViewByPredicateTraversal(predicate, childToSkip); | |
| if (view != null || start == this) { | |
| return view; | |
| } | |
| ViewParent parent = start.getParent(); | |
| if (parent == null || !(parent instanceof View)) { | |
| return null; | |
| } | |
| childToSkip = start; | |
| start = (View) parent; | |
| } | |
| } | |
| /** | |
| * Sets the identifier for this view. The identifier does not have to be | |
| * unique in this view's hierarchy. The identifier should be a positive | |
| * number. | |
| * | |
| * @see #NO_ID | |
| * @see #getId() | |
| * @see #findViewById(int) | |
| * | |
| * @param id a number used to identify the view | |
| * | |
| * @attr ref android.R.styleable#View_id | |
| */ | |
| public void setId(@IdRes int id) { | |
| mID = id; | |
| if (mID == View.NO_ID && mLabelForId != View.NO_ID) { | |
| mID = generateViewId(); | |
| } | |
| } | |
| /** | |
| * {@hide} | |
| * | |
| * @param isRoot true if the view belongs to the root namespace, false | |
| * otherwise | |
| */ | |
| public void setIsRootNamespace(boolean isRoot) { | |
| if (isRoot) { | |
| mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; | |
| } else { | |
| mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; | |
| } | |
| } | |
| /** | |
| * {@hide} | |
| * | |
| * @return true if the view belongs to the root namespace, false otherwise | |
| */ | |
| public boolean isRootNamespace() { | |
| return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; | |
| } | |
| /** | |
| * Returns this view's identifier. | |
| * | |
| * @return a positive integer used to identify the view or {@link #NO_ID} | |
| * if the view has no ID | |
| * | |
| * @see #setId(int) | |
| * @see #findViewById(int) | |
| * @attr ref android.R.styleable#View_id | |
| */ | |
| @IdRes | |
| @ViewDebug.CapturedViewProperty | |
| public int getId() { | |
| return mID; | |
| } | |
| /** | |
| * Returns this view's tag. | |
| * | |
| * @return the Object stored in this view as a tag, or {@code null} if not | |
| * set | |
| * | |
| * @see #setTag(Object) | |
| * @see #getTag(int) | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public Object getTag() { | |
| return mTag; | |
| } | |
| /** | |
| * Sets the tag associated with this view. A tag can be used to mark | |
| * a view in its hierarchy and does not have to be unique within the | |
| * hierarchy. Tags can also be used to store data within a view without | |
| * resorting to another data structure. | |
| * | |
| * @param tag an Object to tag the view with | |
| * | |
| * @see #getTag() | |
| * @see #setTag(int, Object) | |
| */ | |
| public void setTag(final Object tag) { | |
| mTag = tag; | |
| } | |
| /** | |
| * Returns the tag associated with this view and the specified key. | |
| * | |
| * @param key The key identifying the tag | |
| * | |
| * @return the Object stored in this view as a tag, or {@code null} if not | |
| * set | |
| * | |
| * @see #setTag(int, Object) | |
| * @see #getTag() | |
| */ | |
| public Object getTag(int key) { | |
| if (mKeyedTags != null) return mKeyedTags.get(key); | |
| return null; | |
| } | |
| /** | |
| * Sets a tag associated with this view and a key. A tag can be used | |
| * to mark a view in its hierarchy and does not have to be unique within | |
| * the hierarchy. Tags can also be used to store data within a view | |
| * without resorting to another data structure. | |
| * | |
| * The specified key should be an id declared in the resources of the | |
| * application to ensure it is unique (see the <a | |
| * href="{@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). | |
| * Keys identified as belonging to | |
| * the Android framework or not associated with any package will cause | |
| * an {@link IllegalArgumentException} to be thrown. | |
| * | |
| * @param key The key identifying the tag | |
| * @param tag An Object to tag the view with | |
| * | |
| * @throws IllegalArgumentException If they specified key is not valid | |
| * | |
| * @see #setTag(Object) | |
| * @see #getTag(int) | |
| */ | |
| public void setTag(int key, final Object tag) { | |
| // If the package id is 0x00 or 0x01, it's either an undefined package | |
| // or a framework id | |
| if ((key >>> 24) < 2) { | |
| throw new IllegalArgumentException("The key must be an application-specific " | |
| + "resource id."); | |
| } | |
| setKeyedTag(key, tag); | |
| } | |
| /** | |
| * Variation of {@link #setTag(int, Object)} that enforces the key to be a | |
| * framework id. | |
| * | |
| * @hide | |
| */ | |
| public void setTagInternal(int key, Object tag) { | |
| if ((key >>> 24) != 0x1) { | |
| throw new IllegalArgumentException("The key must be a framework-specific " | |
| + "resource id."); | |
| } | |
| setKeyedTag(key, tag); | |
| } | |
| private void setKeyedTag(int key, Object tag) { | |
| if (mKeyedTags == null) { | |
| mKeyedTags = new SparseArray<Object>(2); | |
| } | |
| mKeyedTags.put(key, tag); | |
| } | |
| /** | |
| * Prints information about this view in the log output, with the tag | |
| * {@link #VIEW_LOG_TAG}. | |
| * | |
| * @hide | |
| */ | |
| public void debug() { | |
| debug(0); | |
| } | |
| /** | |
| * Prints information about this view in the log output, with the tag | |
| * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an | |
| * indentation defined by the <code>depth</code>. | |
| * | |
| * @param depth the indentation level | |
| * | |
| * @hide | |
| */ | |
| protected void debug(int depth) { | |
| String output = debugIndent(depth - 1); | |
| output += "+ " + this; | |
| int id = getId(); | |
| if (id != -1) { | |
| output += " (id=" + id + ")"; | |
| } | |
| Object tag = getTag(); | |
| if (tag != null) { | |
| output += " (tag=" + tag + ")"; | |
| } | |
| Log.d(VIEW_LOG_TAG, output); | |
| if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { | |
| output = debugIndent(depth) + " FOCUSED"; | |
| Log.d(VIEW_LOG_TAG, output); | |
| } | |
| output = debugIndent(depth); | |
| output += "frame={" + mLeft + ", " + mTop + ", " + mRight | |
| + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY | |
| + "} "; | |
| Log.d(VIEW_LOG_TAG, output); | |
| if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 | |
| || mPaddingBottom != 0) { | |
| output = debugIndent(depth); | |
| output += "padding={" + mPaddingLeft + ", " + mPaddingTop | |
| + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; | |
| Log.d(VIEW_LOG_TAG, output); | |
| } | |
| output = debugIndent(depth); | |
| output += "mMeasureWidth=" + mMeasuredWidth + | |
| " mMeasureHeight=" + mMeasuredHeight; | |
| Log.d(VIEW_LOG_TAG, output); | |
| output = debugIndent(depth); | |
| if (mLayoutParams == null) { | |
| output += "BAD! no layout params"; | |
| } else { | |
| output = mLayoutParams.debug(output); | |
| } | |
| Log.d(VIEW_LOG_TAG, output); | |
| output = debugIndent(depth); | |
| output += "flags={"; | |
| output += View.printFlags(mViewFlags); | |
| output += "}"; | |
| Log.d(VIEW_LOG_TAG, output); | |
| output = debugIndent(depth); | |
| output += "privateFlags={"; | |
| output += View.printPrivateFlags(mPrivateFlags); | |
| output += "}"; | |
| Log.d(VIEW_LOG_TAG, output); | |
| } | |
| /** | |
| * Creates a string of whitespaces used for indentation. | |
| * | |
| * @param depth the indentation level | |
| * @return a String containing (depth * 2 + 3) * 2 white spaces | |
| * | |
| * @hide | |
| */ | |
| protected static String debugIndent(int depth) { | |
| StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); | |
| for (int i = 0; i < (depth * 2) + 3; i++) { | |
| spaces.append(' ').append(' '); | |
| } | |
| return spaces.toString(); | |
| } | |
| /** | |
| * <p>Return the offset of the widget's text baseline from the widget's top | |
| * boundary. If this widget does not support baseline alignment, this | |
| * method returns -1. </p> | |
| * | |
| * @return the offset of the baseline within the widget's bounds or -1 | |
| * if baseline alignment is not supported | |
| */ | |
| @ViewDebug.ExportedProperty(category = "layout") | |
| public int getBaseline() { | |
| return -1; | |
| } | |
| /** | |
| * Returns whether the view hierarchy is currently undergoing a layout pass. This | |
| * information is useful to avoid situations such as calling {@link #requestLayout()} during | |
| * a layout pass. | |
| * | |
| * @return whether the view hierarchy is currently undergoing a layout pass | |
| */ | |
| public boolean isInLayout() { | |
| ViewRootImpl viewRoot = getViewRootImpl(); | |
| return (viewRoot != null && viewRoot.isInLayout()); | |
| } | |
| /** | |
| * Call this when something has changed which has invalidated the | |
| * layout of this view. This will schedule a layout pass of the view | |
| * tree. This should not be called while the view hierarchy is currently in a layout | |
| * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the | |
| * end of the current layout pass (and then layout will run again) or after the current | |
| * frame is drawn and the next layout occurs. | |
| * | |
| * <p>Subclasses which override this method should call the superclass method to | |
| * handle possible request-during-layout errors correctly.</p> | |
| */ | |
| @CallSuper | |
| public void requestLayout() { | |
| if (mMeasureCache != null) mMeasureCache.clear(); | |
| if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == null) { | |
| // Only trigger request-during-layout logic if this is the view requesting it, | |
| // not the views in its parent hierarchy | |
| ViewRootImpl viewRoot = getViewRootImpl(); | |
| if (viewRoot != null && viewRoot.isInLayout()) { | |
| if (!viewRoot.requestLayoutDuringLayout(this)) { | |
| return; | |
| } | |
| } | |
| mAttachInfo.mViewRequestingLayout = this; | |
| } | |
| mPrivateFlags |= PFLAG_FORCE_LAYOUT; | |
| mPrivateFlags |= PFLAG_INVALIDATED; | |
| if (mParent != null && !mParent.isLayoutRequested()) { | |
| mParent.requestLayout(); | |
| } | |
| if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == this) { | |
| mAttachInfo.mViewRequestingLayout = null; | |
| } | |
| } | |
| /** | |
| * Forces this view to be laid out during the next layout pass. | |
| * This method does not call requestLayout() or forceLayout() | |
| * on the parent. | |
| */ | |
| public void forceLayout() { | |
| if (mMeasureCache != null) mMeasureCache.clear(); | |
| mPrivateFlags |= PFLAG_FORCE_LAYOUT; | |
| mPrivateFlags |= PFLAG_INVALIDATED; | |
| } | |
| /** | |
| * <p> | |
| * This is called to find out how big a view should be. The parent | |
| * supplies constraint information in the width and height parameters. | |
| * </p> | |
| * | |
| * <p> | |
| * The actual measurement work of a view is performed in | |
| * {@link #onMeasure(int, int)}, called by this method. Therefore, only | |
| * {@link #onMeasure(int, int)} can and must be overridden by subclasses. | |
| * </p> | |
| * | |
| * | |
| * @param widthMeasureSpec Horizontal space requirements as imposed by the | |
| * parent | |
| * @param heightMeasureSpec Vertical space requirements as imposed by the | |
| * parent | |
| * | |
| * @see #onMeasure(int, int) | |
| */ | |
| public final void measure(int widthMeasureSpec, int heightMeasureSpec) { | |
| boolean optical = isLayoutModeOptical(this); | |
| if (optical != isLayoutModeOptical(mParent)) { | |
| Insets insets = getOpticalInsets(); | |
| int oWidth = insets.left + insets.right; | |
| int oHeight = insets.top + insets.bottom; | |
| widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); | |
| heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); | |
| } | |
| // Suppress sign extension for the low bytes | |
| long key = (long) widthMeasureSpec << 32 | (long) heightMeasureSpec & 0xffffffffL; | |
| if (mMeasureCache == null) mMeasureCache = new LongSparseLongArray(2); | |
| if ((mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT || | |
| widthMeasureSpec != mOldWidthMeasureSpec || | |
| heightMeasureSpec != mOldHeightMeasureSpec) { | |
| // first clears the measured dimension flag | |
| mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; | |
| resolveRtlPropertiesIfNeeded(); | |
| int cacheIndex = (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT ? -1 : | |
| mMeasureCache.indexOfKey(key); | |
| if (cacheIndex < 0 || sIgnoreMeasureCache) { | |
| // measure ourselves, this should set the measured dimension flag back | |
| onMeasure(widthMeasureSpec, heightMeasureSpec); | |
| mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; | |
| } else { | |
| long value = mMeasureCache.valueAt(cacheIndex); | |
| // Casting a long to int drops the high 32 bits, no mask needed | |
| setMeasuredDimensionRaw((int) (value >> 32), (int) value); | |
| mPrivateFlags3 |= PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; | |
| } | |
| // flag not set, setMeasuredDimension() was not invoked, we raise | |
| // an exception to warn the developer | |
| if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { | |
| throw new IllegalStateException("View with id " + getId() + ": " | |
| + getClass().getName() + "#onMeasure() did not set the" | |
| + " measured dimension by calling" | |
| + " setMeasuredDimension()"); | |
| } | |
| mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; | |
| } | |
| mOldWidthMeasureSpec = widthMeasureSpec; | |
| mOldHeightMeasureSpec = heightMeasureSpec; | |
| mMeasureCache.put(key, ((long) mMeasuredWidth) << 32 | | |
| (long) mMeasuredHeight & 0xffffffffL); // suppress sign extension | |
| } | |
| /** | |
| * <p> | |
| * Measure the view and its content to determine the measured width and the | |
| * measured height. This method is invoked by {@link #measure(int, int)} and | |
| * should be overridden by subclasses to provide accurate and efficient | |
| * measurement of their contents. | |
| * </p> | |
| * | |
| * <p> | |
| * <strong>CONTRACT:</strong> When overriding this method, you | |
| * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the | |
| * measured width and height of this view. Failure to do so will trigger an | |
| * <code>IllegalStateException</code>, thrown by | |
| * {@link #measure(int, int)}. Calling the superclass' | |
| * {@link #onMeasure(int, int)} is a valid use. | |
| * </p> | |
| * | |
| * <p> | |
| * The base class implementation of measure defaults to the background size, | |
| * unless a larger size is allowed by the MeasureSpec. Subclasses should | |
| * override {@link #onMeasure(int, int)} to provide better measurements of | |
| * their content. | |
| * </p> | |
| * | |
| * <p> | |
| * If this method is overridden, it is the subclass's responsibility to make | |
| * sure the measured height and width are at least the view's minimum height | |
| * and width ({@link #getSuggestedMinimumHeight()} and | |
| * {@link #getSuggestedMinimumWidth()}). | |
| * </p> | |
| * | |
| * @param widthMeasureSpec horizontal space requirements as imposed by the parent. | |
| * The requirements are encoded with | |
| * {@link android.view.View.MeasureSpec}. | |
| * @param heightMeasureSpec vertical space requirements as imposed by the parent. | |
| * The requirements are encoded with | |
| * {@link android.view.View.MeasureSpec}. | |
| * | |
| * @see #getMeasuredWidth() | |
| * @see #getMeasuredHeight() | |
| * @see #setMeasuredDimension(int, int) | |
| * @see #getSuggestedMinimumHeight() | |
| * @see #getSuggestedMinimumWidth() | |
| * @see android.view.View.MeasureSpec#getMode(int) | |
| * @see android.view.View.MeasureSpec#getSize(int) | |
| */ | |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { | |
| setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), | |
| getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); | |
| } | |
| /** | |
| * <p>This method must be called by {@link #onMeasure(int, int)} to store the | |
| * measured width and measured height. Failing to do so will trigger an | |
| * exception at measurement time.</p> | |
| * | |
| * @param measuredWidth The measured width of this view. May be a complex | |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and | |
| * {@link #MEASURED_STATE_TOO_SMALL}. | |
| * @param measuredHeight The measured height of this view. May be a complex | |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and | |
| * {@link #MEASURED_STATE_TOO_SMALL}. | |
| */ | |
| protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { | |
| boolean optical = isLayoutModeOptical(this); | |
| if (optical != isLayoutModeOptical(mParent)) { | |
| Insets insets = getOpticalInsets(); | |
| int opticalWidth = insets.left + insets.right; | |
| int opticalHeight = insets.top + insets.bottom; | |
| measuredWidth += optical ? opticalWidth : -opticalWidth; | |
| measuredHeight += optical ? opticalHeight : -opticalHeight; | |
| } | |
| setMeasuredDimensionRaw(measuredWidth, measuredHeight); | |
| } | |
| /** | |
| * Sets the measured dimension without extra processing for things like optical bounds. | |
| * Useful for reapplying consistent values that have already been cooked with adjustments | |
| * for optical bounds, etc. such as those from the measurement cache. | |
| * | |
| * @param measuredWidth The measured width of this view. May be a complex | |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and | |
| * {@link #MEASURED_STATE_TOO_SMALL}. | |
| * @param measuredHeight The measured height of this view. May be a complex | |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and | |
| * {@link #MEASURED_STATE_TOO_SMALL}. | |
| */ | |
| private void setMeasuredDimensionRaw(int measuredWidth, int measuredHeight) { | |
| mMeasuredWidth = measuredWidth; | |
| mMeasuredHeight = measuredHeight; | |
| mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; | |
| } | |
| /** | |
| * Merge two states as returned by {@link #getMeasuredState()}. | |
| * @param curState The current state as returned from a view or the result | |
| * of combining multiple views. | |
| * @param newState The new view state to combine. | |
| * @return Returns a new integer reflecting the combination of the two | |
| * states. | |
| */ | |
| public static int combineMeasuredStates(int curState, int newState) { | |
| return curState | newState; | |
| } | |
| /** | |
| * Version of {@link #resolveSizeAndState(int, int, int)} | |
| * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. | |
| */ | |
| public static int resolveSize(int size, int measureSpec) { | |
| return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; | |
| } | |
| /** | |
| * Utility to reconcile a desired size and state, with constraints imposed | |
| * by a MeasureSpec. Will take the desired size, unless a different size | |
| * is imposed by the constraints. The returned value is a compound integer, | |
| * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and | |
| * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the | |
| * resulting size is smaller than the size the view wants to be. | |
| * | |
| * @param size How big the view wants to be. | |
| * @param measureSpec Constraints imposed by the parent. | |
| * @param childMeasuredState Size information bit mask for the view's | |
| * children. | |
| * @return Size information bit mask as defined by | |
| * {@link #MEASURED_SIZE_MASK} and | |
| * {@link #MEASURED_STATE_TOO_SMALL}. | |
| */ | |
| public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { | |
| final int specMode = MeasureSpec.getMode(measureSpec); | |
| final int specSize = MeasureSpec.getSize(measureSpec); | |
| final int result; | |
| switch (specMode) { | |
| case MeasureSpec.AT_MOST: | |
| if (specSize < size) { | |
| result = specSize | MEASURED_STATE_TOO_SMALL; | |
| } else { | |
| result = size; | |
| } | |
| break; | |
| case MeasureSpec.EXACTLY: | |
| result = specSize; | |
| break; | |
| case MeasureSpec.UNSPECIFIED: | |
| default: | |
| result = size; | |
| } | |
| return result | (childMeasuredState & MEASURED_STATE_MASK); | |
| } | |
| /** | |
| * Utility to return a default size. Uses the supplied size if the | |
| * MeasureSpec imposed no constraints. Will get larger if allowed | |
| * by the MeasureSpec. | |
| * | |
| * @param size Default size for this view | |
| * @param measureSpec Constraints imposed by the parent | |
| * @return The size this view should be. | |
| */ | |
| public static int getDefaultSize(int size, int measureSpec) { | |
| int result = size; | |
| int specMode = MeasureSpec.getMode(measureSpec); | |
| int specSize = MeasureSpec.getSize(measureSpec); | |
| switch (specMode) { | |
| case MeasureSpec.UNSPECIFIED: | |
| result = size; | |
| break; | |
| case MeasureSpec.AT_MOST: | |
| case MeasureSpec.EXACTLY: | |
| result = specSize; | |
| break; | |
| } | |
| return result; | |
| } | |
| /** | |
| * Returns the suggested minimum height that the view should use. This | |
| * returns the maximum of the view's minimum height | |
| * and the background's minimum height | |
| * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). | |
| * <p> | |
| * When being used in {@link #onMeasure(int, int)}, the caller should still | |
| * ensure the returned height is within the requirements of the parent. | |
| * | |
| * @return The suggested minimum height of the view. | |
| */ | |
| protected int getSuggestedMinimumHeight() { | |
| return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); | |
| } | |
| /** | |
| * Returns the suggested minimum width that the view should use. This | |
| * returns the maximum of the view's minimum width | |
| * and the background's minimum width | |
| * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). | |
| * <p> | |
| * When being used in {@link #onMeasure(int, int)}, the caller should still | |
| * ensure the returned width is within the requirements of the parent. | |
| * | |
| * @return The suggested minimum width of the view. | |
| */ | |
| protected int getSuggestedMinimumWidth() { | |
| return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); | |
| } | |
| /** | |
| * Returns the minimum height of the view. | |
| * | |
| * @return the minimum height the view will try to be. | |
| * | |
| * @see #setMinimumHeight(int) | |
| * | |
| * @attr ref android.R.styleable#View_minHeight | |
| */ | |
| public int getMinimumHeight() { | |
| return mMinHeight; | |
| } | |
| /** | |
| * Sets the minimum height of the view. It is not guaranteed the view will | |
| * be able to achieve this minimum height (for example, if its parent layout | |
| * constrains it with less available height). | |
| * | |
| * @param minHeight The minimum height the view will try to be. | |
| * | |
| * @see #getMinimumHeight() | |
| * | |
| * @attr ref android.R.styleable#View_minHeight | |
| */ | |
| public void setMinimumHeight(int minHeight) { | |
| mMinHeight = minHeight; | |
| requestLayout(); | |
| } | |
| /** | |
| * Returns the minimum width of the view. | |
| * | |
| * @return the minimum width the view will try to be. | |
| * | |
| * @see #setMinimumWidth(int) | |
| * | |
| * @attr ref android.R.styleable#View_minWidth | |
| */ | |
| public int getMinimumWidth() { | |
| return mMinWidth; | |
| } | |
| /** | |
| * Sets the minimum width of the view. It is not guaranteed the view will | |
| * be able to achieve this minimum width (for example, if its parent layout | |
| * constrains it with less available width). | |
| * | |
| * @param minWidth The minimum width the view will try to be. | |
| * | |
| * @see #getMinimumWidth() | |
| * | |
| * @attr ref android.R.styleable#View_minWidth | |
| */ | |
| public void setMinimumWidth(int minWidth) { | |
| mMinWidth = minWidth; | |
| requestLayout(); | |
| } | |
| /** | |
| * Get the animation currently associated with this view. | |
| * | |
| * @return The animation that is currently playing or | |
| * scheduled to play for this view. | |
| */ | |
| public Animation getAnimation() { | |
| return mCurrentAnimation; | |
| } | |
| /** | |
| * Start the specified animation now. | |
| * | |
| * @param animation the animation to start now | |
| */ | |
| public void startAnimation(Animation animation) { | |
| animation.setStartTime(Animation.START_ON_FIRST_FRAME); | |
| setAnimation(animation); | |
| invalidateParentCaches(); | |
| invalidate(true); | |
| } | |
| /** | |
| * Cancels any animations for this view. | |
| */ | |
| public void clearAnimation() { | |
| if (mCurrentAnimation != null) { | |
| mCurrentAnimation.detach(); | |
| } | |
| mCurrentAnimation = null; | |
| invalidateParentIfNeeded(); | |
| } | |
| /** | |
| * Sets the next animation to play for this view. | |
| * If you want the animation to play immediately, use | |
| * {@link #startAnimation(android.view.animation.Animation)} instead. | |
| * This method provides allows fine-grained | |
| * control over the start time and invalidation, but you | |
| * must make sure that 1) the animation has a start time set, and | |
| * 2) the view's parent (which controls animations on its children) | |
| * will be invalidated when the animation is supposed to | |
| * start. | |
| * | |
| * @param animation The next animation, or null. | |
| */ | |
| public void setAnimation(Animation animation) { | |
| mCurrentAnimation = animation; | |
| if (animation != null) { | |
| // If the screen is off assume the animation start time is now instead of | |
| // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time | |
| // would cause the animation to start when the screen turns back on | |
| if (mAttachInfo != null && mAttachInfo.mDisplayState == Display.STATE_OFF | |
| && animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { | |
| animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); | |
| } | |
| animation.reset(); | |
| } | |
| } | |
| /** | |
| * Invoked by a parent ViewGroup to notify the start of the animation | |
| * currently associated with this view. If you override this method, | |
| * always call super.onAnimationStart(); | |
| * | |
| * @see #setAnimation(android.view.animation.Animation) | |
| * @see #getAnimation() | |
| */ | |
| @CallSuper | |
| protected void onAnimationStart() { | |
| mPrivateFlags |= PFLAG_ANIMATION_STARTED; | |
| } | |
| /** | |
| * Invoked by a parent ViewGroup to notify the end of the animation | |
| * currently associated with this view. If you override this method, | |
| * always call super.onAnimationEnd(); | |
| * | |
| * @see #setAnimation(android.view.animation.Animation) | |
| * @see #getAnimation() | |
| */ | |
| @CallSuper | |
| protected void onAnimationEnd() { | |
| mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; | |
| } | |
| /** | |
| * Invoked if there is a Transform that involves alpha. Subclass that can | |
| * draw themselves with the specified alpha should return true, and then | |
| * respect that alpha when their onDraw() is called. If this returns false | |
| * then the view may be redirected to draw into an offscreen buffer to | |
| * fulfill the request, which will look fine, but may be slower than if the | |
| * subclass handles it internally. The default implementation returns false. | |
| * | |
| * @param alpha The alpha (0..255) to apply to the view's drawing | |
| * @return true if the view can draw with the specified alpha. | |
| */ | |
| protected boolean onSetAlpha(int alpha) { | |
| return false; | |
| } | |
| /** | |
| * This is used by the RootView to perform an optimization when | |
| * the view hierarchy contains one or several SurfaceView. | |
| * SurfaceView is always considered transparent, but its children are not, | |
| * therefore all View objects remove themselves from the global transparent | |
| * region (passed as a parameter to this function). | |
| * | |
| * @param region The transparent region for this ViewAncestor (window). | |
| * | |
| * @return Returns true if the effective visibility of the view at this | |
| * point is opaque, regardless of the transparent region; returns false | |
| * if it is possible for underlying windows to be seen behind the view. | |
| * | |
| * {@hide} | |
| */ | |
| public boolean gatherTransparentRegion(Region region) { | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (region != null && attachInfo != null) { | |
| final int pflags = mPrivateFlags; | |
| if ((pflags & PFLAG_SKIP_DRAW) == 0) { | |
| // The SKIP_DRAW flag IS NOT set, so this view draws. We need to | |
| // remove it from the transparent region. | |
| final int[] location = attachInfo.mTransparentLocation; | |
| getLocationInWindow(location); | |
| region.op(location[0], location[1], location[0] + mRight - mLeft, | |
| location[1] + mBottom - mTop, Region.Op.DIFFERENCE); | |
| } else { | |
| if (mBackground != null && mBackground.getOpacity() != PixelFormat.TRANSPARENT) { | |
| // The SKIP_DRAW flag IS set and the background drawable exists, we remove | |
| // the background drawable's non-transparent parts from this transparent region. | |
| applyDrawableToTransparentRegion(mBackground, region); | |
| } | |
| if (mForegroundInfo != null && mForegroundInfo.mDrawable != null | |
| && mForegroundInfo.mDrawable.getOpacity() != PixelFormat.TRANSPARENT) { | |
| // Similarly, we remove the foreground drawable's non-transparent parts. | |
| applyDrawableToTransparentRegion(mForegroundInfo.mDrawable, region); | |
| } | |
| } | |
| } | |
| return true; | |
| } | |
| /** | |
| * Play a sound effect for this view. | |
| * | |
| * <p>The framework will play sound effects for some built in actions, such as | |
| * clicking, but you may wish to play these effects in your widget, | |
| * for instance, for internal navigation. | |
| * | |
| * <p>The sound effect will only be played if sound effects are enabled by the user, and | |
| * {@link #isSoundEffectsEnabled()} is true. | |
| * | |
| * @param soundConstant One of the constants defined in {@link SoundEffectConstants} | |
| */ | |
| public void playSoundEffect(int soundConstant) { | |
| if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { | |
| return; | |
| } | |
| mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); | |
| } | |
| /** | |
| * BZZZTT!!1! | |
| * | |
| * <p>Provide haptic feedback to the user for this view. | |
| * | |
| * <p>The framework will provide haptic feedback for some built in actions, | |
| * such as long presses, but you may wish to provide feedback for your | |
| * own widget. | |
| * | |
| * <p>The feedback will only be performed if | |
| * {@link #isHapticFeedbackEnabled()} is true. | |
| * | |
| * @param feedbackConstant One of the constants defined in | |
| * {@link HapticFeedbackConstants} | |
| */ | |
| public boolean performHapticFeedback(int feedbackConstant) { | |
| return performHapticFeedback(feedbackConstant, 0); | |
| } | |
| /** | |
| * BZZZTT!!1! | |
| * | |
| * <p>Like {@link #performHapticFeedback(int)}, with additional options. | |
| * | |
| * @param feedbackConstant One of the constants defined in | |
| * {@link HapticFeedbackConstants} | |
| * @param flags Additional flags as per {@link HapticFeedbackConstants}. | |
| */ | |
| public boolean performHapticFeedback(int feedbackConstant, int flags) { | |
| if (mAttachInfo == null) { | |
| return false; | |
| } | |
| //noinspection SimplifiableIfStatement | |
| if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 | |
| && !isHapticFeedbackEnabled()) { | |
| return false; | |
| } | |
| return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, | |
| (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); | |
| } | |
| /** | |
| * Request that the visibility of the status bar or other screen/window | |
| * decorations be changed. | |
| * | |
| * <p>This method is used to put the over device UI into temporary modes | |
| * where the user's attention is focused more on the application content, | |
| * by dimming or hiding surrounding system affordances. This is typically | |
| * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY | |
| * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content | |
| * to be placed behind the action bar (and with these flags other system | |
| * affordances) so that smooth transitions between hiding and showing them | |
| * can be done. | |
| * | |
| * <p>Two representative examples of the use of system UI visibility is | |
| * implementing a content browsing application (like a magazine reader) | |
| * and a video playing application. | |
| * | |
| * <p>The first code shows a typical implementation of a View in a content | |
| * browsing application. In this implementation, the application goes | |
| * into a content-oriented mode by hiding the status bar and action bar, | |
| * and putting the navigation elements into lights out mode. The user can | |
| * then interact with content while in this mode. Such an application should | |
| * provide an easy way for the user to toggle out of the mode (such as to | |
| * check information in the status bar or access notifications). In the | |
| * implementation here, this is done simply by tapping on the content. | |
| * | |
| * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java | |
| * content} | |
| * | |
| * <p>This second code sample shows a typical implementation of a View | |
| * in a video playing application. In this situation, while the video is | |
| * playing the application would like to go into a complete full-screen mode, | |
| * to use as much of the display as possible for the video. When in this state | |
| * the user can not interact with the application; the system intercepts | |
| * touching on the screen to pop the UI out of full screen mode. See | |
| * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. | |
| * | |
| * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java | |
| * content} | |
| * | |
| * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, | |
| * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. | |
| */ | |
| public void setSystemUiVisibility(int visibility) { | |
| if (visibility != mSystemUiVisibility) { | |
| mSystemUiVisibility = visibility; | |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { | |
| mParent.recomputeViewAttributes(this); | |
| } | |
| } | |
| } | |
| /** | |
| * Returns the last {@link #setSystemUiVisibility(int)} that this view has requested. | |
| * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, | |
| * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, | |
| * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. | |
| */ | |
| public int getSystemUiVisibility() { | |
| return mSystemUiVisibility; | |
| } | |
| /** | |
| * Returns the current system UI visibility that is currently set for | |
| * the entire window. This is the combination of the | |
| * {@link #setSystemUiVisibility(int)} values supplied by all of the | |
| * views in the window. | |
| */ | |
| public int getWindowSystemUiVisibility() { | |
| return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; | |
| } | |
| /** | |
| * Override to find out when the window's requested system UI visibility | |
| * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. | |
| * This is different from the callbacks received through | |
| * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} | |
| * in that this is only telling you about the local request of the window, | |
| * not the actual values applied by the system. | |
| */ | |
| public void onWindowSystemUiVisibilityChanged(int visible) { | |
| } | |
| /** | |
| * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down | |
| * the view hierarchy. | |
| */ | |
| public void dispatchWindowSystemUiVisiblityChanged(int visible) { | |
| onWindowSystemUiVisibilityChanged(visible); | |
| } | |
| /** | |
| * Set a listener to receive callbacks when the visibility of the system bar changes. | |
| * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. | |
| */ | |
| public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { | |
| getListenerInfo().mOnSystemUiVisibilityChangeListener = l; | |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { | |
| mParent.recomputeViewAttributes(this); | |
| } | |
| } | |
| /** | |
| * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down | |
| * the view hierarchy. | |
| */ | |
| public void dispatchSystemUiVisibilityChanged(int visibility) { | |
| ListenerInfo li = mListenerInfo; | |
| if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { | |
| li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( | |
| visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); | |
| } | |
| } | |
| boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { | |
| int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); | |
| if (val != mSystemUiVisibility) { | |
| setSystemUiVisibility(val); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** @hide */ | |
| public void setDisabledSystemUiVisibility(int flags) { | |
| if (mAttachInfo != null) { | |
| if (mAttachInfo.mDisabledSystemUiVisibility != flags) { | |
| mAttachInfo.mDisabledSystemUiVisibility = flags; | |
| if (mParent != null) { | |
| mParent.recomputeViewAttributes(this); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Creates an image that the system displays during the drag and drop | |
| * operation. This is called a "drag shadow". The default implementation | |
| * for a DragShadowBuilder based on a View returns an image that has exactly the same | |
| * appearance as the given View. The default also positions the center of the drag shadow | |
| * directly under the touch point. If no View is provided (the constructor with no parameters | |
| * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and | |
| * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overridden, then the | |
| * default is an invisible drag shadow. | |
| * <p> | |
| * You are not required to use the View you provide to the constructor as the basis of the | |
| * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw | |
| * anything you want as the drag shadow. | |
| * </p> | |
| * <p> | |
| * You pass a DragShadowBuilder object to the system when you start the drag. The system | |
| * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the | |
| * size and position of the drag shadow. It uses this data to construct a | |
| * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} | |
| * so that your application can draw the shadow image in the Canvas. | |
| * </p> | |
| * | |
| * <div class="special reference"> | |
| * <h3>Developer Guides</h3> | |
| * <p>For a guide to implementing drag and drop features, read the | |
| * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> | |
| * </div> | |
| */ | |
| public static class DragShadowBuilder { | |
| private final WeakReference<View> mView; | |
| /** | |
| * Constructs a shadow image builder based on a View. By default, the resulting drag | |
| * shadow will have the same appearance and dimensions as the View, with the touch point | |
| * over the center of the View. | |
| * @param view A View. Any View in scope can be used. | |
| */ | |
| public DragShadowBuilder(View view) { | |
| mView = new WeakReference<View>(view); | |
| } | |
| /** | |
| * Construct a shadow builder object with no associated View. This | |
| * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} | |
| * and {@link #onDrawShadow(Canvas)} methods are also overridden in order | |
| * to supply the drag shadow's dimensions and appearance without | |
| * reference to any View object. If they are not overridden, then the result is an | |
| * invisible drag shadow. | |
| */ | |
| public DragShadowBuilder() { | |
| mView = new WeakReference<View>(null); | |
| } | |
| /** | |
| * Returns the View object that had been passed to the | |
| * {@link #View.DragShadowBuilder(View)} | |
| * constructor. If that View parameter was {@code null} or if the | |
| * {@link #View.DragShadowBuilder()} | |
| * constructor was used to instantiate the builder object, this method will return | |
| * null. | |
| * | |
| * @return The View object associate with this builder object. | |
| */ | |
| @SuppressWarnings({"JavadocReference"}) | |
| final public View getView() { | |
| return mView.get(); | |
| } | |
| /** | |
| * Provides the metrics for the shadow image. These include the dimensions of | |
| * the shadow image, and the point within that shadow that should | |
| * be centered under the touch location while dragging. | |
| * <p> | |
| * The default implementation sets the dimensions of the shadow to be the | |
| * same as the dimensions of the View itself and centers the shadow under | |
| * the touch point. | |
| * </p> | |
| * | |
| * @param shadowSize A {@link android.graphics.Point} containing the width and height | |
| * of the shadow image. Your application must set {@link android.graphics.Point#x} to the | |
| * desired width and must set {@link android.graphics.Point#y} to the desired height of the | |
| * image. | |
| * | |
| * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the | |
| * shadow image that should be underneath the touch point during the drag and drop | |
| * operation. Your application must set {@link android.graphics.Point#x} to the | |
| * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. | |
| */ | |
| public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { | |
| final View view = mView.get(); | |
| if (view != null) { | |
| shadowSize.set(view.getWidth(), view.getHeight()); | |
| shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); | |
| } else { | |
| Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); | |
| } | |
| } | |
| /** | |
| * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object | |
| * based on the dimensions it received from the | |
| * {@link #onProvideShadowMetrics(Point, Point)} callback. | |
| * | |
| * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. | |
| */ | |
| public void onDrawShadow(Canvas canvas) { | |
| final View view = mView.get(); | |
| if (view != null) { | |
| view.draw(canvas); | |
| } else { | |
| Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); | |
| } | |
| } | |
| } | |
| /** | |
| * Starts a drag and drop operation. When your application calls this method, it passes a | |
| * {@link android.view.View.DragShadowBuilder} object to the system. The | |
| * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} | |
| * to get metrics for the drag shadow, and then calls the object's | |
| * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. | |
| * <p> | |
| * Once the system has the drag shadow, it begins the drag and drop operation by sending | |
| * drag events to all the View objects in your application that are currently visible. It does | |
| * this either by calling the View object's drag listener (an implementation of | |
| * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the | |
| * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. | |
| * Both are passed a {@link android.view.DragEvent} object that has a | |
| * {@link android.view.DragEvent#getAction()} value of | |
| * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. | |
| * </p> | |
| * <p> | |
| * Your application can invoke startDrag() on any attached View object. The View object does not | |
| * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to | |
| * be related to the View the user selected for dragging. | |
| * </p> | |
| * @param data A {@link android.content.ClipData} object pointing to the data to be | |
| * transferred by the drag and drop operation. | |
| * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the | |
| * drag shadow. | |
| * @param myLocalState An {@link java.lang.Object} containing local data about the drag and | |
| * drop operation. This Object is put into every DragEvent object sent by the system during the | |
| * current drag. | |
| * <p> | |
| * myLocalState is a lightweight mechanism for the sending information from the dragged View | |
| * to the target Views. For example, it can contain flags that differentiate between a | |
| * a copy operation and a move operation. | |
| * </p> | |
| * @param flags Flags that control the drag and drop operation. No flags are currently defined, | |
| * so the parameter should be set to 0. | |
| * @return {@code true} if the method completes successfully, or | |
| * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to | |
| * do a drag, and so no drag operation is in progress. | |
| */ | |
| public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, | |
| Object myLocalState, int flags) { | |
| if (ViewDebug.DEBUG_DRAG) { | |
| Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); | |
| } | |
| boolean okay = false; | |
| Point shadowSize = new Point(); | |
| Point shadowTouchPoint = new Point(); | |
| shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); | |
| if ((shadowSize.x < 0) || (shadowSize.y < 0) || | |
| (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { | |
| throw new IllegalStateException("Drag shadow dimensions must not be negative"); | |
| } | |
| if (ViewDebug.DEBUG_DRAG) { | |
| Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y | |
| + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); | |
| } | |
| Surface surface = new Surface(); | |
| try { | |
| IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, | |
| flags, shadowSize.x, shadowSize.y, surface); | |
| if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token | |
| + " surface=" + surface); | |
| if (token != null) { | |
| Canvas canvas = surface.lockCanvas(null); | |
| try { | |
| canvas.drawColor(0, PorterDuff.Mode.CLEAR); | |
| shadowBuilder.onDrawShadow(canvas); | |
| } finally { | |
| surface.unlockCanvasAndPost(canvas); | |
| } | |
| final ViewRootImpl root = getViewRootImpl(); | |
| // Cache the local state object for delivery with DragEvents | |
| root.setLocalDragState(myLocalState); | |
| // repurpose 'shadowSize' for the last touch point | |
| root.getLastTouchPoint(shadowSize); | |
| okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, | |
| shadowSize.x, shadowSize.y, | |
| shadowTouchPoint.x, shadowTouchPoint.y, data); | |
| if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); | |
| // Off and running! Release our local surface instance; the drag | |
| // shadow surface is now managed by the system process. | |
| surface.release(); | |
| } | |
| } catch (Exception e) { | |
| Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); | |
| surface.destroy(); | |
| } | |
| return okay; | |
| } | |
| /** | |
| * Handles drag events sent by the system following a call to | |
| * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. | |
| *<p> | |
| * When the system calls this method, it passes a | |
| * {@link android.view.DragEvent} object. A call to | |
| * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined | |
| * in DragEvent. The method uses these to determine what is happening in the drag and drop | |
| * operation. | |
| * @param event The {@link android.view.DragEvent} sent by the system. | |
| * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined | |
| * in DragEvent, indicating the type of drag event represented by this object. | |
| * @return {@code true} if the method was successful, otherwise {@code false}. | |
| * <p> | |
| * The method should return {@code true} in response to an action type of | |
| * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current | |
| * operation. | |
| * </p> | |
| * <p> | |
| * The method should also return {@code true} in response to an action type of | |
| * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or | |
| * {@code false} if it didn't. | |
| * </p> | |
| */ | |
| public boolean onDragEvent(DragEvent event) { | |
| return false; | |
| } | |
| /** | |
| * Detects if this View is enabled and has a drag event listener. | |
| * If both are true, then it calls the drag event listener with the | |
| * {@link android.view.DragEvent} it received. If the drag event listener returns | |
| * {@code true}, then dispatchDragEvent() returns {@code true}. | |
| * <p> | |
| * For all other cases, the method calls the | |
| * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler | |
| * method and returns its result. | |
| * </p> | |
| * <p> | |
| * This ensures that a drag event is always consumed, even if the View does not have a drag | |
| * event listener. However, if the View has a listener and the listener returns true, then | |
| * onDragEvent() is not called. | |
| * </p> | |
| */ | |
| public boolean dispatchDragEvent(DragEvent event) { | |
| ListenerInfo li = mListenerInfo; | |
| //noinspection SimplifiableIfStatement | |
| if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED | |
| && li.mOnDragListener.onDrag(this, event)) { | |
| return true; | |
| } | |
| return onDragEvent(event); | |
| } | |
| boolean canAcceptDrag() { | |
| return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; | |
| } | |
| /** | |
| * This needs to be a better API (NOT ON VIEW) before it is exposed. If | |
| * it is ever exposed at all. | |
| * @hide | |
| */ | |
| public void onCloseSystemDialogs(String reason) { | |
| } | |
| /** | |
| * Given a Drawable whose bounds have been set to draw into this view, | |
| * update a Region being computed for | |
| * {@link #gatherTransparentRegion(android.graphics.Region)} so | |
| * that any non-transparent parts of the Drawable are removed from the | |
| * given transparent region. | |
| * | |
| * @param dr The Drawable whose transparency is to be applied to the region. | |
| * @param region A Region holding the current transparency information, | |
| * where any parts of the region that are set are considered to be | |
| * transparent. On return, this region will be modified to have the | |
| * transparency information reduced by the corresponding parts of the | |
| * Drawable that are not transparent. | |
| * {@hide} | |
| */ | |
| public void applyDrawableToTransparentRegion(Drawable dr, Region region) { | |
| if (DBG) { | |
| Log.i("View", "Getting transparent region for: " + this); | |
| } | |
| final Region r = dr.getTransparentRegion(); | |
| final Rect db = dr.getBounds(); | |
| final AttachInfo attachInfo = mAttachInfo; | |
| if (r != null && attachInfo != null) { | |
| final int w = getRight()-getLeft(); | |
| final int h = getBottom()-getTop(); | |
| if (db.left > 0) { | |
| //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); | |
| r.op(0, 0, db.left, h, Region.Op.UNION); | |
| } | |
| if (db.right < w) { | |
| //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); | |
| r.op(db.right, 0, w, h, Region.Op.UNION); | |
| } | |
| if (db.top > 0) { | |
| //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); | |
| r.op(0, 0, w, db.top, Region.Op.UNION); | |
| } | |
| if (db.bottom < h) { | |
| //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); | |
| r.op(0, db.bottom, w, h, Region.Op.UNION); | |
| } | |
| final int[] location = attachInfo.mTransparentLocation; | |
| getLocationInWindow(location); | |
| r.translate(location[0], location[1]); | |
| region.op(r, Region.Op.INTERSECT); | |
| } else { | |
| region.op(db, Region.Op.DIFFERENCE); | |
| } | |
| } | |
| private void checkForLongClick(int delayOffset) { | |
| if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { | |
| mHasPerformedLongPress = false; | |
| if (mPendingCheckForLongPress == null) { | |
| mPendingCheckForLongPress = new CheckForLongPress(); | |
| } | |
| mPendingCheckForLongPress.rememberWindowAttachCount(); | |
| postDelayed(mPendingCheckForLongPress, | |
| ViewConfiguration.getLongPressTimeout() - delayOffset); | |
| } | |
| } | |
| /** | |
| * Inflate a view from an XML resource. This convenience method wraps the {@link | |
| * LayoutInflater} class, which provides a full range of options for view inflation. | |
| * | |
| * @param context The Context object for your activity or application. | |
| * @param resource The resource ID to inflate | |
| * @param root A view group that will be the parent. Used to properly inflate the | |
| * layout_* parameters. | |
| * @see LayoutInflater | |
| */ | |
| public static View inflate(Context context, @LayoutRes int resource, ViewGroup root) { | |
| LayoutInflater factory = LayoutInflater.from(context); | |
| return factory.inflate(resource, root); | |
| } | |
| /** | |
| * Scroll the view with standard behavior for scrolling beyond the normal | |
| * content boundaries. Views that call this method should override | |
| * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the | |
| * results of an over-scroll operation. | |
| * | |
| * Views can use this method to handle any touch or fling-based scrolling. | |
| * | |
| * @param deltaX Change in X in pixels | |
| * @param deltaY Change in Y in pixels | |
| * @param scrollX Current X scroll value in pixels before applying deltaX | |
| * @param scrollY Current Y scroll value in pixels before applying deltaY | |
| * @param scrollRangeX Maximum content scroll range along the X axis | |
| * @param scrollRangeY Maximum content scroll range along the Y axis | |
| * @param maxOverScrollX Number of pixels to overscroll by in either direction | |
| * along the X axis. | |
| * @param maxOverScrollY Number of pixels to overscroll by in either direction | |
| * along the Y axis. | |
| * @param isTouchEvent true if this scroll operation is the result of a touch event. | |
| * @return true if scrolling was clamped to an over-scroll boundary along either | |
| * axis, false otherwise. | |
| */ | |
| @SuppressWarnings({"UnusedParameters"}) | |
| protected boolean overScrollBy(int deltaX, int deltaY, | |
| int scrollX, int scrollY, | |
| int scrollRangeX, int scrollRangeY, | |
| int maxOverScrollX, int maxOverScrollY, | |
| boolean isTouchEvent) { | |
| final int overScrollMode = mOverScrollMode; | |
| final boolean canScrollHorizontal = | |
| computeHorizontalScrollRange() > computeHorizontalScrollExtent(); | |
| final boolean canScrollVertical = | |
| computeVerticalScrollRange() > computeVerticalScrollExtent(); | |
| final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || | |
| (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); | |
| final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || | |
| (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); | |
| int newScrollX = scrollX + deltaX; | |
| if (!overScrollHorizontal) { | |
| maxOverScrollX = 0; | |
| } | |
| int newScrollY = scrollY + deltaY; | |
| if (!overScrollVertical) { | |
| maxOverScrollY = 0; | |
| } | |
| // Clamp values if at the limits and record | |
| final int left = -maxOverScrollX; | |
| final int right = maxOverScrollX + scrollRangeX; | |
| final int top = -maxOverScrollY; | |
| final int bottom = maxOverScrollY + scrollRangeY; | |
| boolean clampedX = false; | |
| if (newScrollX > right) { | |
| newScrollX = right; | |
| clampedX = true; | |
| } else if (newScrollX < left) { | |
| newScrollX = left; | |
| clampedX = true; | |
| } | |
| boolean clampedY = false; | |
| if (newScrollY > bottom) { | |
| newScrollY = bottom; | |
| clampedY = true; | |
| } else if (newScrollY < top) { | |
| newScrollY = top; | |
| clampedY = true; | |
| } | |
| onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); | |
| return clampedX || clampedY; | |
| } | |
| /** | |
| * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to | |
| * respond to the results of an over-scroll operation. | |
| * | |
| * @param scrollX New X scroll value in pixels | |
| * @param scrollY New Y scroll value in pixels | |
| * @param clampedX True if scrollX was clamped to an over-scroll boundary | |
| * @param clampedY True if scrollY was clamped to an over-scroll boundary | |
| */ | |
| protected void onOverScrolled(int scrollX, int scrollY, | |
| boolean clampedX, boolean clampedY) { | |
| // Intentionally empty. | |
| } | |
| /** | |
| * Returns the over-scroll mode for this view. The result will be | |
| * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} | |
| * (allow over-scrolling only if the view content is larger than the container), | |
| * or {@link #OVER_SCROLL_NEVER}. | |
| * | |
| * @return This view's over-scroll mode. | |
| */ | |
| public int getOverScrollMode() { | |
| return mOverScrollMode; | |
| } | |
| /** | |
| * Set the over-scroll mode for this view. Valid over-scroll modes are | |
| * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} | |
| * (allow over-scrolling only if the view content is larger than the container), | |
| * or {@link #OVER_SCROLL_NEVER}. | |
| * | |
| * Setting the over-scroll mode of a view will have an effect only if the | |
| * view is capable of scrolling. | |
| * | |
| * @param overScrollMode The new over-scroll mode for this view. | |
| */ | |
| public void setOverScrollMode(int overScrollMode) { | |
| if (overScrollMode != OVER_SCROLL_ALWAYS && | |
| overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && | |
| overScrollMode != OVER_SCROLL_NEVER) { | |
| throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); | |
| } | |
| mOverScrollMode = overScrollMode; | |
| } | |
| /** | |
| * Enable or disable nested scrolling for this view. | |
| * | |
| * <p>If this property is set to true the view will be permitted to initiate nested | |
| * scrolling operations with a compatible parent view in the current hierarchy. If this | |
| * view does not implement nested scrolling this will have no effect. Disabling nested scrolling | |
| * while a nested scroll is in progress has the effect of {@link #stopNestedScroll() stopping} | |
| * the nested scroll.</p> | |
| * | |
| * @param enabled true to enable nested scrolling, false to disable | |
| * | |
| * @see #isNestedScrollingEnabled() | |
| */ | |
| public void setNestedScrollingEnabled(boolean enabled) { | |
| if (enabled) { | |
| mPrivateFlags3 |= PFLAG3_NESTED_SCROLLING_ENABLED; | |
| } else { | |
| stopNestedScroll(); | |
| mPrivateFlags3 &= ~PFLAG3_NESTED_SCROLLING_ENABLED; | |
| } | |
| } | |
| /** | |
| * Returns true if nested scrolling is enabled for this view. | |
| * | |
| * <p>If nested scrolling is enabled and this View class implementation supports it, | |
| * this view will act as a nested scrolling child view when applicable, forwarding data | |
| * about the scroll operation in progress to a compatible and cooperating nested scrolling | |
| * parent.</p> | |
| * | |
| * @return true if nested scrolling is enabled | |
| * | |
| * @see #setNestedScrollingEnabled(boolean) | |
| */ | |
| public boolean isNestedScrollingEnabled() { | |
| return (mPrivateFlags3 & PFLAG3_NESTED_SCROLLING_ENABLED) == | |
| PFLAG3_NESTED_SCROLLING_ENABLED; | |
| } | |
| /** | |
| * Begin a nestable scroll operation along the given axes. | |
| * | |
| * <p>A view starting a nested scroll promises to abide by the following contract:</p> | |
| * | |
| * <p>The view will call startNestedScroll upon initiating a scroll operation. In the case | |
| * of a touch scroll this corresponds to the initial {@link MotionEvent#ACTION_DOWN}. | |
| * In the case of touch scrolling the nested scroll will be terminated automatically in | |
| * the same manner as {@link ViewParent#requestDisallowInterceptTouchEvent(boolean)}. | |
| * In the event of programmatic scrolling the caller must explicitly call | |
| * {@link #stopNestedScroll()} to indicate the end of the nested scroll.</p> | |
| * | |
| * <p>If <code>startNestedScroll</code> returns true, a cooperative parent was found. | |
| * If it returns false the caller may ignore the rest of this contract until the next scroll. | |
| * Calling startNestedScroll while a nested scroll is already in progress will return true.</p> | |
| * | |
| * <p>At each incremental step of the scroll the caller should invoke | |
| * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} | |
| * once it has calculated the requested scrolling delta. If it returns true the nested scrolling | |
| * parent at least partially consumed the scroll and the caller should adjust the amount it | |
| * scrolls by.</p> | |
| * | |
| * <p>After applying the remainder of the scroll delta the caller should invoke | |
| * {@link #dispatchNestedScroll(int, int, int, int, int[]) dispatchNestedScroll}, passing | |
| * both the delta consumed and the delta unconsumed. A nested scrolling parent may treat | |
| * these values differently. See {@link ViewParent#onNestedScroll(View, int, int, int, int)}. | |
| * </p> | |
| * | |
| * @param axes Flags consisting of a combination of {@link #SCROLL_AXIS_HORIZONTAL} and/or | |
| * {@link #SCROLL_AXIS_VERTICAL}. | |
| * @return true if a cooperative parent was found and nested scrolling has been enabled for | |
| * the current gesture. | |
| * | |
| * @see #stopNestedScroll() | |
| * @see #dispatchNestedPreScroll(int, int, int[], int[]) | |
| * @see #dispatchNestedScroll(int, int, int, int, int[]) | |
| */ | |
| public boolean startNestedScroll(int axes) { | |
| if (hasNestedScrollingParent()) { | |
| // Already in progress | |
| return true; | |
| } | |
| if (isNestedScrollingEnabled()) { | |
| ViewParent p = getParent(); | |
| View child = this; | |
| while (p != null) { | |
| try { | |
| if (p.onStartNestedScroll(child, this, axes)) { | |
| mNestedScrollingParent = p; | |
| p.onNestedScrollAccepted(child, this, axes); | |
| return true; | |
| } | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, "ViewParent " + p + " does not implement interface " + | |
| "method onStartNestedScroll", e); | |
| // Allow the search upward to continue | |
| } | |
| if (p instanceof View) { | |
| child = (View) p; | |
| } | |
| p = p.getParent(); | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Stop a nested scroll in progress. | |
| * | |
| * <p>Calling this method when a nested scroll is not currently in progress is harmless.</p> | |
| * | |
| * @see #startNestedScroll(int) | |
| */ | |
| public void stopNestedScroll() { | |
| if (mNestedScrollingParent != null) { | |
| mNestedScrollingParent.onStopNestedScroll(this); | |
| mNestedScrollingParent = null; | |
| } | |
| } | |
| /** | |
| * Returns true if this view has a nested scrolling parent. | |
| * | |
| * <p>The presence of a nested scrolling parent indicates that this view has initiated | |
| * a nested scroll and it was accepted by an ancestor view further up the view hierarchy.</p> | |
| * | |
| * @return whether this view has a nested scrolling parent | |
| */ | |
| public boolean hasNestedScrollingParent() { | |
| return mNestedScrollingParent != null; | |
| } | |
| /** | |
| * Dispatch one step of a nested scroll in progress. | |
| * | |
| * <p>Implementations of views that support nested scrolling should call this to report | |
| * info about a scroll in progress to the current nested scrolling parent. If a nested scroll | |
| * is not currently in progress or nested scrolling is not | |
| * {@link #isNestedScrollingEnabled() enabled} for this view this method does nothing.</p> | |
| * | |
| * <p>Compatible View implementations should also call | |
| * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} before | |
| * consuming a component of the scroll event themselves.</p> | |
| * | |
| * @param dxConsumed Horizontal distance in pixels consumed by this view during this scroll step | |
| * @param dyConsumed Vertical distance in pixels consumed by this view during this scroll step | |
| * @param dxUnconsumed Horizontal scroll distance in pixels not consumed by this view | |
| * @param dyUnconsumed Horizontal scroll distance in pixels not consumed by this view | |
| * @param offsetInWindow Optional. If not null, on return this will contain the offset | |
| * in local view coordinates of this view from before this operation | |
| * to after it completes. View implementations may use this to adjust | |
| * expected input coordinate tracking. | |
| * @return true if the event was dispatched, false if it could not be dispatched. | |
| * @see #dispatchNestedPreScroll(int, int, int[], int[]) | |
| */ | |
| public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, | |
| int dxUnconsumed, int dyUnconsumed, @Nullable @Size(2) int[] offsetInWindow) { | |
| if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { | |
| if (dxConsumed != 0 || dyConsumed != 0 || dxUnconsumed != 0 || dyUnconsumed != 0) { | |
| int startX = 0; | |
| int startY = 0; | |
| if (offsetInWindow != null) { | |
| getLocationInWindow(offsetInWindow); | |
| startX = offsetInWindow[0]; | |
| startY = offsetInWindow[1]; | |
| } | |
| mNestedScrollingParent.onNestedScroll(this, dxConsumed, dyConsumed, | |
| dxUnconsumed, dyUnconsumed); | |
| if (offsetInWindow != null) { | |
| getLocationInWindow(offsetInWindow); | |
| offsetInWindow[0] -= startX; | |
| offsetInWindow[1] -= startY; | |
| } | |
| return true; | |
| } else if (offsetInWindow != null) { | |
| // No motion, no dispatch. Keep offsetInWindow up to date. | |
| offsetInWindow[0] = 0; | |
| offsetInWindow[1] = 0; | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dispatch one step of a nested scroll in progress before this view consumes any portion of it. | |
| * | |
| * <p>Nested pre-scroll events are to nested scroll events what touch intercept is to touch. | |
| * <code>dispatchNestedPreScroll</code> offers an opportunity for the parent view in a nested | |
| * scrolling operation to consume some or all of the scroll operation before the child view | |
| * consumes it.</p> | |
| * | |
| * @param dx Horizontal scroll distance in pixels | |
| * @param dy Vertical scroll distance in pixels | |
| * @param consumed Output. If not null, consumed[0] will contain the consumed component of dx | |
| * and consumed[1] the consumed dy. | |
| * @param offsetInWindow Optional. If not null, on return this will contain the offset | |
| * in local view coordinates of this view from before this operation | |
| * to after it completes. View implementations may use this to adjust | |
| * expected input coordinate tracking. | |
| * @return true if the parent consumed some or all of the scroll delta | |
| * @see #dispatchNestedScroll(int, int, int, int, int[]) | |
| */ | |
| public boolean dispatchNestedPreScroll(int dx, int dy, | |
| @Nullable @Size(2) int[] consumed, @Nullable @Size(2) int[] offsetInWindow) { | |
| if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { | |
| if (dx != 0 || dy != 0) { | |
| int startX = 0; | |
| int startY = 0; | |
| if (offsetInWindow != null) { | |
| getLocationInWindow(offsetInWindow); | |
| startX = offsetInWindow[0]; | |
| startY = offsetInWindow[1]; | |
| } | |
| if (consumed == null) { | |
| if (mTempNestedScrollConsumed == null) { | |
| mTempNestedScrollConsumed = new int[2]; | |
| } | |
| consumed = mTempNestedScrollConsumed; | |
| } | |
| consumed[0] = 0; | |
| consumed[1] = 0; | |
| mNestedScrollingParent.onNestedPreScroll(this, dx, dy, consumed); | |
| if (offsetInWindow != null) { | |
| getLocationInWindow(offsetInWindow); | |
| offsetInWindow[0] -= startX; | |
| offsetInWindow[1] -= startY; | |
| } | |
| return consumed[0] != 0 || consumed[1] != 0; | |
| } else if (offsetInWindow != null) { | |
| offsetInWindow[0] = 0; | |
| offsetInWindow[1] = 0; | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dispatch a fling to a nested scrolling parent. | |
| * | |
| * <p>This method should be used to indicate that a nested scrolling child has detected | |
| * suitable conditions for a fling. Generally this means that a touch scroll has ended with a | |
| * {@link VelocityTracker velocity} in the direction of scrolling that meets or exceeds | |
| * the {@link ViewConfiguration#getScaledMinimumFlingVelocity() minimum fling velocity} | |
| * along a scrollable axis.</p> | |
| * | |
| * <p>If a nested scrolling child view would normally fling but it is at the edge of | |
| * its own content, it can use this method to delegate the fling to its nested scrolling | |
| * parent instead. The parent may optionally consume the fling or observe a child fling.</p> | |
| * | |
| * @param velocityX Horizontal fling velocity in pixels per second | |
| * @param velocityY Vertical fling velocity in pixels per second | |
| * @param consumed true if the child consumed the fling, false otherwise | |
| * @return true if the nested scrolling parent consumed or otherwise reacted to the fling | |
| */ | |
| public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) { | |
| if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { | |
| return mNestedScrollingParent.onNestedFling(this, velocityX, velocityY, consumed); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dispatch a fling to a nested scrolling parent before it is processed by this view. | |
| * | |
| * <p>Nested pre-fling events are to nested fling events what touch intercept is to touch | |
| * and what nested pre-scroll is to nested scroll. <code>dispatchNestedPreFling</code> | |
| * offsets an opportunity for the parent view in a nested fling to fully consume the fling | |
| * before the child view consumes it. If this method returns <code>true</code>, a nested | |
| * parent view consumed the fling and this view should not scroll as a result.</p> | |
| * | |
| * <p>For a better user experience, only one view in a nested scrolling chain should consume | |
| * the fling at a time. If a parent view consumed the fling this method will return false. | |
| * Custom view implementations should account for this in two ways:</p> | |
| * | |
| * <ul> | |
| * <li>If a custom view is paged and needs to settle to a fixed page-point, do not | |
| * call <code>dispatchNestedPreFling</code>; consume the fling and settle to a valid | |
| * position regardless.</li> | |
| * <li>If a nested parent does consume the fling, this view should not scroll at all, | |
| * even to settle back to a valid idle position.</li> | |
| * </ul> | |
| * | |
| * <p>Views should also not offer fling velocities to nested parent views along an axis | |
| * where scrolling is not currently supported; a {@link android.widget.ScrollView ScrollView} | |
| * should not offer a horizontal fling velocity to its parents since scrolling along that | |
| * axis is not permitted and carrying velocity along that motion does not make sense.</p> | |
| * | |
| * @param velocityX Horizontal fling velocity in pixels per second | |
| * @param velocityY Vertical fling velocity in pixels per second | |
| * @return true if a nested scrolling parent consumed the fling | |
| */ | |
| public boolean dispatchNestedPreFling(float velocityX, float velocityY) { | |
| if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { | |
| return mNestedScrollingParent.onNestedPreFling(this, velocityX, velocityY); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Gets a scale factor that determines the distance the view should scroll | |
| * vertically in response to {@link MotionEvent#ACTION_SCROLL}. | |
| * @return The vertical scroll scale factor. | |
| * @hide | |
| */ | |
| protected float getVerticalScrollFactor() { | |
| if (mVerticalScrollFactor == 0) { | |
| TypedValue outValue = new TypedValue(); | |
| if (!mContext.getTheme().resolveAttribute( | |
| com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { | |
| throw new IllegalStateException( | |
| "Expected theme to define listPreferredItemHeight."); | |
| } | |
| mVerticalScrollFactor = outValue.getDimension( | |
| mContext.getResources().getDisplayMetrics()); | |
| } | |
| return mVerticalScrollFactor; | |
| } | |
| /** | |
| * Gets a scale factor that determines the distance the view should scroll | |
| * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. | |
| * @return The horizontal scroll scale factor. | |
| * @hide | |
| */ | |
| protected float getHorizontalScrollFactor() { | |
| // TODO: Should use something else. | |
| return getVerticalScrollFactor(); | |
| } | |
| /** | |
| * Return the value specifying the text direction or policy that was set with | |
| * {@link #setTextDirection(int)}. | |
| * | |
| * @return the defined text direction. It can be one of: | |
| * | |
| * {@link #TEXT_DIRECTION_INHERIT}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG}, | |
| * {@link #TEXT_DIRECTION_ANY_RTL}, | |
| * {@link #TEXT_DIRECTION_LTR}, | |
| * {@link #TEXT_DIRECTION_RTL}, | |
| * {@link #TEXT_DIRECTION_LOCALE}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} | |
| * | |
| * @attr ref android.R.styleable#View_textDirection | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "text", mapping = { | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") | |
| }) | |
| public int getRawTextDirection() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; | |
| } | |
| /** | |
| * Set the text direction. | |
| * | |
| * @param textDirection the direction to set. Should be one of: | |
| * | |
| * {@link #TEXT_DIRECTION_INHERIT}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG}, | |
| * {@link #TEXT_DIRECTION_ANY_RTL}, | |
| * {@link #TEXT_DIRECTION_LTR}, | |
| * {@link #TEXT_DIRECTION_RTL}, | |
| * {@link #TEXT_DIRECTION_LOCALE} | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL}, | |
| * | |
| * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution | |
| * proceeds up the parent chain of the view to get the value. If there is no parent, then it will | |
| * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. | |
| * | |
| * @attr ref android.R.styleable#View_textDirection | |
| */ | |
| public void setTextDirection(int textDirection) { | |
| if (getRawTextDirection() != textDirection) { | |
| // Reset the current text direction and the resolved one | |
| mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; | |
| resetResolvedTextDirection(); | |
| // Set the new text direction | |
| mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); | |
| // Do resolution | |
| resolveTextDirection(); | |
| // Notify change | |
| onRtlPropertiesChanged(getLayoutDirection()); | |
| // Refresh | |
| requestLayout(); | |
| invalidate(true); | |
| } | |
| } | |
| /** | |
| * Return the resolved text direction. | |
| * | |
| * @return the resolved text direction. Returns one of: | |
| * | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG}, | |
| * {@link #TEXT_DIRECTION_ANY_RTL}, | |
| * {@link #TEXT_DIRECTION_LTR}, | |
| * {@link #TEXT_DIRECTION_RTL}, | |
| * {@link #TEXT_DIRECTION_LOCALE}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, | |
| * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} | |
| * | |
| * @attr ref android.R.styleable#View_textDirection | |
| */ | |
| @ViewDebug.ExportedProperty(category = "text", mapping = { | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), | |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") | |
| }) | |
| public int getTextDirection() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; | |
| } | |
| /** | |
| * Resolve the text direction. | |
| * | |
| * @return true if resolution has been done, false otherwise. | |
| * | |
| * @hide | |
| */ | |
| public boolean resolveTextDirection() { | |
| // Reset any previous text direction resolution | |
| mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); | |
| if (hasRtlSupport()) { | |
| // Set resolved text direction flag depending on text direction flag | |
| final int textDirection = getRawTextDirection(); | |
| switch(textDirection) { | |
| case TEXT_DIRECTION_INHERIT: | |
| if (!canResolveTextDirection()) { | |
| // We cannot do the resolution if there is no parent, so use the default one | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| // Resolution will need to happen again later | |
| return false; | |
| } | |
| // Parent has not yet resolved, so we still return the default | |
| try { | |
| if (!mParent.isTextDirectionResolved()) { | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| // Resolution will need to happen again later | |
| return false; | |
| } | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED | | |
| PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| return true; | |
| } | |
| // Set current resolved direction to the same value as the parent's one | |
| int parentResolvedDirection; | |
| try { | |
| parentResolvedDirection = mParent.getTextDirection(); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| parentResolvedDirection = TEXT_DIRECTION_LTR; | |
| } | |
| switch (parentResolvedDirection) { | |
| case TEXT_DIRECTION_FIRST_STRONG: | |
| case TEXT_DIRECTION_ANY_RTL: | |
| case TEXT_DIRECTION_LTR: | |
| case TEXT_DIRECTION_RTL: | |
| case TEXT_DIRECTION_LOCALE: | |
| case TEXT_DIRECTION_FIRST_STRONG_LTR: | |
| case TEXT_DIRECTION_FIRST_STRONG_RTL: | |
| mPrivateFlags2 |= | |
| (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); | |
| break; | |
| default: | |
| // Default resolved direction is "first strong" heuristic | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| } | |
| break; | |
| case TEXT_DIRECTION_FIRST_STRONG: | |
| case TEXT_DIRECTION_ANY_RTL: | |
| case TEXT_DIRECTION_LTR: | |
| case TEXT_DIRECTION_RTL: | |
| case TEXT_DIRECTION_LOCALE: | |
| case TEXT_DIRECTION_FIRST_STRONG_LTR: | |
| case TEXT_DIRECTION_FIRST_STRONG_RTL: | |
| // Resolved direction is the same as text direction | |
| mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); | |
| break; | |
| default: | |
| // Default resolved direction is "first strong" heuristic | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| } | |
| } else { | |
| // Default resolved direction is "first strong" heuristic | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| } | |
| // Set to resolved | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; | |
| return true; | |
| } | |
| /** | |
| * Check if text direction resolution can be done. | |
| * | |
| * @return true if text direction resolution can be done otherwise return false. | |
| */ | |
| public boolean canResolveTextDirection() { | |
| switch (getRawTextDirection()) { | |
| case TEXT_DIRECTION_INHERIT: | |
| if (mParent != null) { | |
| try { | |
| return mParent.canResolveTextDirection(); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| } | |
| return false; | |
| default: | |
| return true; | |
| } | |
| } | |
| /** | |
| * Reset resolved text direction. Text direction will be resolved during a call to | |
| * {@link #onMeasure(int, int)}. | |
| * | |
| * @hide | |
| */ | |
| public void resetResolvedTextDirection() { | |
| // Reset any previous text direction resolution | |
| mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); | |
| // Set to default value | |
| mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; | |
| } | |
| /** | |
| * @return true if text direction is inherited. | |
| * | |
| * @hide | |
| */ | |
| public boolean isTextDirectionInherited() { | |
| return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); | |
| } | |
| /** | |
| * @return true if text direction is resolved. | |
| */ | |
| public boolean isTextDirectionResolved() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; | |
| } | |
| /** | |
| * Return the value specifying the text alignment or policy that was set with | |
| * {@link #setTextAlignment(int)}. | |
| * | |
| * @return the defined text alignment. It can be one of: | |
| * | |
| * {@link #TEXT_ALIGNMENT_INHERIT}, | |
| * {@link #TEXT_ALIGNMENT_GRAVITY}, | |
| * {@link #TEXT_ALIGNMENT_CENTER}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_START}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_END}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_START}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_END} | |
| * | |
| * @attr ref android.R.styleable#View_textAlignment | |
| * | |
| * @hide | |
| */ | |
| @ViewDebug.ExportedProperty(category = "text", mapping = { | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") | |
| }) | |
| @TextAlignment | |
| public int getRawTextAlignment() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; | |
| } | |
| /** | |
| * Set the text alignment. | |
| * | |
| * @param textAlignment The text alignment to set. Should be one of | |
| * | |
| * {@link #TEXT_ALIGNMENT_INHERIT}, | |
| * {@link #TEXT_ALIGNMENT_GRAVITY}, | |
| * {@link #TEXT_ALIGNMENT_CENTER}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_START}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_END}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_START}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_END} | |
| * | |
| * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution | |
| * proceeds up the parent chain of the view to get the value. If there is no parent, then it | |
| * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. | |
| * | |
| * @attr ref android.R.styleable#View_textAlignment | |
| */ | |
| public void setTextAlignment(@TextAlignment int textAlignment) { | |
| if (textAlignment != getRawTextAlignment()) { | |
| // Reset the current and resolved text alignment | |
| mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; | |
| resetResolvedTextAlignment(); | |
| // Set the new text alignment | |
| mPrivateFlags2 |= | |
| ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); | |
| // Do resolution | |
| resolveTextAlignment(); | |
| // Notify change | |
| onRtlPropertiesChanged(getLayoutDirection()); | |
| // Refresh | |
| requestLayout(); | |
| invalidate(true); | |
| } | |
| } | |
| /** | |
| * Return the resolved text alignment. | |
| * | |
| * @return the resolved text alignment. Returns one of: | |
| * | |
| * {@link #TEXT_ALIGNMENT_GRAVITY}, | |
| * {@link #TEXT_ALIGNMENT_CENTER}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_START}, | |
| * {@link #TEXT_ALIGNMENT_TEXT_END}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_START}, | |
| * {@link #TEXT_ALIGNMENT_VIEW_END} | |
| * | |
| * @attr ref android.R.styleable#View_textAlignment | |
| */ | |
| @ViewDebug.ExportedProperty(category = "text", mapping = { | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), | |
| @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") | |
| }) | |
| @TextAlignment | |
| public int getTextAlignment() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> | |
| PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; | |
| } | |
| /** | |
| * Resolve the text alignment. | |
| * | |
| * @return true if resolution has been done, false otherwise. | |
| * | |
| * @hide | |
| */ | |
| public boolean resolveTextAlignment() { | |
| // Reset any previous text alignment resolution | |
| mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); | |
| if (hasRtlSupport()) { | |
| // Set resolved text alignment flag depending on text alignment flag | |
| final int textAlignment = getRawTextAlignment(); | |
| switch (textAlignment) { | |
| case TEXT_ALIGNMENT_INHERIT: | |
| // Check if we can resolve the text alignment | |
| if (!canResolveTextAlignment()) { | |
| // We cannot do the resolution if there is no parent so use the default | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| // Resolution will need to happen again later | |
| return false; | |
| } | |
| // Parent has not yet resolved, so we still return the default | |
| try { | |
| if (!mParent.isTextAlignmentResolved()) { | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| // Resolution will need to happen again later | |
| return false; | |
| } | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED | | |
| PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| return true; | |
| } | |
| int parentResolvedTextAlignment; | |
| try { | |
| parentResolvedTextAlignment = mParent.getTextAlignment(); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| parentResolvedTextAlignment = TEXT_ALIGNMENT_GRAVITY; | |
| } | |
| switch (parentResolvedTextAlignment) { | |
| case TEXT_ALIGNMENT_GRAVITY: | |
| case TEXT_ALIGNMENT_TEXT_START: | |
| case TEXT_ALIGNMENT_TEXT_END: | |
| case TEXT_ALIGNMENT_CENTER: | |
| case TEXT_ALIGNMENT_VIEW_START: | |
| case TEXT_ALIGNMENT_VIEW_END: | |
| // Resolved text alignment is the same as the parent resolved | |
| // text alignment | |
| mPrivateFlags2 |= | |
| (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); | |
| break; | |
| default: | |
| // Use default resolved text alignment | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| } | |
| break; | |
| case TEXT_ALIGNMENT_GRAVITY: | |
| case TEXT_ALIGNMENT_TEXT_START: | |
| case TEXT_ALIGNMENT_TEXT_END: | |
| case TEXT_ALIGNMENT_CENTER: | |
| case TEXT_ALIGNMENT_VIEW_START: | |
| case TEXT_ALIGNMENT_VIEW_END: | |
| // Resolved text alignment is the same as text alignment | |
| mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); | |
| break; | |
| default: | |
| // Use default resolved text alignment | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| } | |
| } else { | |
| // Use default resolved text alignment | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| } | |
| // Set the resolved | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; | |
| return true; | |
| } | |
| /** | |
| * Check if text alignment resolution can be done. | |
| * | |
| * @return true if text alignment resolution can be done otherwise return false. | |
| */ | |
| public boolean canResolveTextAlignment() { | |
| switch (getRawTextAlignment()) { | |
| case TEXT_DIRECTION_INHERIT: | |
| if (mParent != null) { | |
| try { | |
| return mParent.canResolveTextAlignment(); | |
| } catch (AbstractMethodError e) { | |
| Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + | |
| " does not fully implement ViewParent", e); | |
| } | |
| } | |
| return false; | |
| default: | |
| return true; | |
| } | |
| } | |
| /** | |
| * Reset resolved text alignment. Text alignment will be resolved during a call to | |
| * {@link #onMeasure(int, int)}. | |
| * | |
| * @hide | |
| */ | |
| public void resetResolvedTextAlignment() { | |
| // Reset any previous text alignment resolution | |
| mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); | |
| // Set to default | |
| mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; | |
| } | |
| /** | |
| * @return true if text alignment is inherited. | |
| * | |
| * @hide | |
| */ | |
| public boolean isTextAlignmentInherited() { | |
| return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); | |
| } | |
| /** | |
| * @return true if text alignment is resolved. | |
| */ | |
| public boolean isTextAlignmentResolved() { | |
| return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; | |
| } | |
| /** | |
| * Generate a value suitable for use in {@link #setId(int)}. | |
| * This value will not collide with ID values generated at build time by aapt for R.id. | |
| * | |
| * @return a generated ID value | |
| */ | |
| public static int generateViewId() { | |
| for (;;) { | |
| final int result = sNextGeneratedId.get(); | |
| // aapt-generated IDs have the high byte nonzero; clamp to the range under that. | |
| int newValue = result + 1; | |
| if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. | |
| if (sNextGeneratedId.compareAndSet(result, newValue)) { | |
| return result; | |
| } | |
| } | |
| } | |
| /** | |
| * Gets the Views in the hierarchy affected by entering and exiting Activity Scene transitions. | |
| * @param transitioningViews This View will be added to transitioningViews if it is VISIBLE and | |
| * a normal View or a ViewGroup with | |
| * {@link android.view.ViewGroup#isTransitionGroup()} true. | |
| * @hide | |
| */ | |
| public void captureTransitioningViews(List<View> transitioningViews) { | |
| if (getVisibility() == View.VISIBLE) { | |
| transitioningViews.add(this); | |
| } | |
| } | |
| /** | |
| * Adds all Views that have {@link #getTransitionName()} non-null to namedElements. | |
| * @param namedElements Will contain all Views in the hierarchy having a transitionName. | |
| * @hide | |
| */ | |
| public void findNamedViews(Map<String, View> namedElements) { | |
| if (getVisibility() == VISIBLE || mGhostView != null) { | |
| String transitionName = getTransitionName(); | |
| if (transitionName != null) { | |
| namedElements.put(transitionName, this); | |
| } | |
| } | |
| } | |
| // | |
| // Properties | |
| // | |
| /** | |
| * A Property wrapper around the <code>alpha</code> functionality handled by the | |
| * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. | |
| */ | |
| public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setAlpha(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getAlpha(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>translationX</code> functionality handled by the | |
| * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. | |
| */ | |
| public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setTranslationX(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getTranslationX(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>translationY</code> functionality handled by the | |
| * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. | |
| */ | |
| public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setTranslationY(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getTranslationY(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>translationZ</code> functionality handled by the | |
| * {@link View#setTranslationZ(float)} and {@link View#getTranslationZ()} methods. | |
| */ | |
| public static final Property<View, Float> TRANSLATION_Z = new FloatProperty<View>("translationZ") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setTranslationZ(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getTranslationZ(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>x</code> functionality handled by the | |
| * {@link View#setX(float)} and {@link View#getX()} methods. | |
| */ | |
| public static final Property<View, Float> X = new FloatProperty<View>("x") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setX(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getX(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>y</code> functionality handled by the | |
| * {@link View#setY(float)} and {@link View#getY()} methods. | |
| */ | |
| public static final Property<View, Float> Y = new FloatProperty<View>("y") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setY(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getY(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>z</code> functionality handled by the | |
| * {@link View#setZ(float)} and {@link View#getZ()} methods. | |
| */ | |
| public static final Property<View, Float> Z = new FloatProperty<View>("z") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setZ(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getZ(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>rotation</code> functionality handled by the | |
| * {@link View#setRotation(float)} and {@link View#getRotation()} methods. | |
| */ | |
| public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setRotation(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getRotation(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>rotationX</code> functionality handled by the | |
| * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. | |
| */ | |
| public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setRotationX(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getRotationX(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>rotationY</code> functionality handled by the | |
| * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. | |
| */ | |
| public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setRotationY(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getRotationY(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>scaleX</code> functionality handled by the | |
| * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. | |
| */ | |
| public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setScaleX(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getScaleX(); | |
| } | |
| }; | |
| /** | |
| * A Property wrapper around the <code>scaleY</code> functionality handled by the | |
| * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. | |
| */ | |
| public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { | |
| @Override | |
| public void setValue(View object, float value) { | |
| object.setScaleY(value); | |
| } | |
| @Override | |
| public Float get(View object) { | |
| return object.getScaleY(); | |
| } | |
| }; | |
| /** | |
| * A MeasureSpec encapsulates the layout requirements passed from parent to child. | |
| * Each MeasureSpec represents a requirement for either the width or the height. | |
| * A MeasureSpec is comprised of a size and a mode. There are three possible | |
| * modes: | |
| * <dl> | |
| * <dt>UNSPECIFIED</dt> | |
| * <dd> | |
| * The parent has not imposed any constraint on the child. It can be whatever size | |
| * it wants. | |
| * </dd> | |
| * | |
| * <dt>EXACTLY</dt> | |
| * <dd> | |
| * The parent has determined an exact size for the child. The child is going to be | |
| * given those bounds regardless of how big it wants to be. | |
| * </dd> | |
| * | |
| * <dt>AT_MOST</dt> | |
| * <dd> | |
| * The child can be as large as it wants up to the specified size. | |
| * </dd> | |
| * </dl> | |
| * | |
| * MeasureSpecs are implemented as ints to reduce object allocation. This class | |
| * is provided to pack and unpack the <size, mode> tuple into the int. | |
| */ | |
| public static class MeasureSpec { | |
| private static final int MODE_SHIFT = 30; | |
| private static final int MODE_MASK = 0x3 << MODE_SHIFT; | |
| /** | |
| * Measure specification mode: The parent has not imposed any constraint | |
| * on the child. It can be whatever size it wants. | |
| */ | |
| public static final int UNSPECIFIED = 0 << MODE_SHIFT; | |
| /** | |
| * Measure specification mode: The parent has determined an exact size | |
| * for the child. The child is going to be given those bounds regardless | |
| * of how big it wants to be. | |
| */ | |
| public static final int EXACTLY = 1 << MODE_SHIFT; | |
| /** | |
| * Measure specification mode: The child can be as large as it wants up | |
| * to the specified size. | |
| */ | |
| public static final int AT_MOST = 2 << MODE_SHIFT; | |
| /** | |
| * Creates a measure specification based on the supplied size and mode. | |
| * | |
| * The mode must always be one of the following: | |
| * <ul> | |
| * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> | |
| * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> | |
| * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> | |
| * </ul> | |
| * | |
| * <p><strong>Note:</strong> On API level 17 and lower, makeMeasureSpec's | |
| * implementation was such that the order of arguments did not matter | |
| * and overflow in either value could impact the resulting MeasureSpec. | |
| * {@link android.widget.RelativeLayout} was affected by this bug. | |
| * Apps targeting API levels greater than 17 will get the fixed, more strict | |
| * behavior.</p> | |
| * | |
| * @param size the size of the measure specification | |
| * @param mode the mode of the measure specification | |
| * @return the measure specification based on size and mode | |
| */ | |
| public static int makeMeasureSpec(int size, int mode) { | |
| if (sUseBrokenMakeMeasureSpec) { | |
| return size + mode; | |
| } else { | |
| return (size & ~MODE_MASK) | (mode & MODE_MASK); | |
| } | |
| } | |
| /** | |
| * Like {@link #makeMeasureSpec(int, int)}, but any spec with a mode of UNSPECIFIED | |
| * will automatically get a size of 0. Older apps expect this. | |
| * | |
| * @hide internal use only for compatibility with system widgets and older apps | |
| */ | |
| public static int makeSafeMeasureSpec(int size, int mode) { | |
| if (sUseZeroUnspecifiedMeasureSpec && mode == UNSPECIFIED) { | |
| return 0; | |
| } | |
| return makeMeasureSpec(size, mode); | |
| } | |
| /** | |
| * Extracts the mode from the supplied measure specification. | |
| * | |
| * @param measureSpec the measure specification to extract the mode from | |
| * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, | |
| * {@link android.view.View.MeasureSpec#AT_MOST} or | |
| * {@link android.view.View.MeasureSpec#EXACTLY} | |
| */ | |
| public static int getMode(int measureSpec) { | |
| return (measureSpec & MODE_MASK); | |
| } | |
| /** | |
| * Extracts the size from the supplied measure specification. | |
| * | |
| * @param measureSpec the measure specification to extract the size from | |
| * @return the size in pixels defined in the supplied measure specification | |
| */ | |
| public static int getSize(int measureSpec) { | |
| return (measureSpec & ~MODE_MASK); | |
| } | |
| static int adjust(int measureSpec, int delta) { | |
| final int mode = getMode(measureSpec); | |
| int size = getSize(measureSpec); | |
| if (mode == UNSPECIFIED) { | |
| // No need to adjust size for UNSPECIFIED mode. | |
| return makeMeasureSpec(size, UNSPECIFIED); | |
| } | |
| size += delta; | |
| if (size < 0) { | |
| Log.e(VIEW_LOG_TAG, "MeasureSpec.adjust: new size would be negative! (" + size + | |
| ") spec: " + toString(measureSpec) + " delta: " + delta); | |
| size = 0; | |
| } | |
| return makeMeasureSpec(size, mode); | |
| } | |
| /** | |
| * Returns a String representation of the specified measure | |
| * specification. | |
| * | |
| * @param measureSpec the measure specification to convert to a String | |
| * @return a String with the following format: "MeasureSpec: MODE SIZE" | |
| */ | |
| public static String toString(int measureSpec) { | |
| int mode = getMode(measureSpec); | |
| int size = getSize(measureSpec); | |
| StringBuilder sb = new StringBuilder("MeasureSpec: "); | |
| if (mode == UNSPECIFIED) | |
| sb.append("UNSPECIFIED "); | |
| else if (mode == EXACTLY) | |
| sb.append("EXACTLY "); | |
| else if (mode == AT_MOST) | |
| sb.append("AT_MOST "); | |
| else | |
| sb.append(mode).append(" "); | |
| sb.append(size); | |
| return sb.toString(); | |
| } | |
| } | |
| private final class CheckForLongPress implements Runnable { | |
| private int mOriginalWindowAttachCount; | |
| @Override | |
| public void run() { | |
| if (isPressed() && (mParent != null) | |
| && mOriginalWindowAttachCount == mWindowAttachCount) { | |
| if (performLongClick()) { | |
| mHasPerformedLongPress = true; | |
| } | |
| } | |
| } | |
| public void rememberWindowAttachCount() { | |
| mOriginalWindowAttachCount = mWindowAttachCount; | |
| } | |
| } | |
| private final class CheckForTap implements Runnable { | |
| public float x; | |
| public float y; | |
| @Override | |
| public void run() { | |
| mPrivateFlags &= ~PFLAG_PREPRESSED; | |
| setPressed(true, x, y); | |
| checkForLongClick(ViewConfiguration.getTapTimeout()); | |
| } | |
| } | |
| private final class PerformClick implements Runnable { | |
| @Override | |
| public void run() { | |
| performClick(); | |
| } | |
| } | |
| /** @hide */ | |
| public void hackTurnOffWindowResizeAnim(boolean off) { | |
| mAttachInfo.mTurnOffWindowResizeAnim = off; | |
| } | |
| /** | |
| * This method returns a ViewPropertyAnimator object, which can be used to animate | |
| * specific properties on this View. | |
| * | |
| * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. | |
| */ | |
| public ViewPropertyAnimator animate() { | |
| if (mAnimator == null) { | |
| mAnimator = new ViewPropertyAnimator(this); | |
| } | |
| return mAnimator; | |
| } | |
| /** | |
| * Sets the name of the View to be used to identify Views in Transitions. | |
| * Names should be unique in the View hierarchy. | |
| * | |
| * @param transitionName The name of the View to uniquely identify it for Transitions. | |
| */ | |
| public final void setTransitionName(String transitionName) { | |
| mTransitionName = transitionName; | |
| } | |
| /** | |
| * Returns the name of the View to be used to identify Views in Transitions. | |
| * Names should be unique in the View hierarchy. | |
| * | |
| * <p>This returns null if the View has not been given a name.</p> | |
| * | |
| * @return The name used of the View to be used to identify Views in Transitions or null | |
| * if no name has been given. | |
| */ | |
| @ViewDebug.ExportedProperty | |
| public String getTransitionName() { | |
| return mTransitionName; | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a hardware key event is | |
| * dispatched to this view. The callback will be invoked before the key event is | |
| * given to the view. This is only useful for hardware keyboards; a software input | |
| * method has no obligation to trigger this listener. | |
| */ | |
| public interface OnKeyListener { | |
| /** | |
| * Called when a hardware key is dispatched to a view. This allows listeners to | |
| * get a chance to respond before the target view. | |
| * <p>Key presses in software keyboards will generally NOT trigger this method, | |
| * although some may elect to do so in some situations. Do not assume a | |
| * software input method has to be key-based; even if it is, it may use key presses | |
| * in a different way than you expect, so there is no way to reliably catch soft | |
| * input key presses. | |
| * | |
| * @param v The view the key has been dispatched to. | |
| * @param keyCode The code for the physical key that was pressed | |
| * @param event The KeyEvent object containing full information about | |
| * the event. | |
| * @return True if the listener has consumed the event, false otherwise. | |
| */ | |
| boolean onKey(View v, int keyCode, KeyEvent event); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a touch event is | |
| * dispatched to this view. The callback will be invoked before the touch | |
| * event is given to the view. | |
| */ | |
| public interface OnTouchListener { | |
| /** | |
| * Called when a touch event is dispatched to a view. This allows listeners to | |
| * get a chance to respond before the target view. | |
| * | |
| * @param v The view the touch event has been dispatched to. | |
| * @param event The MotionEvent object containing full information about | |
| * the event. | |
| * @return True if the listener has consumed the event, false otherwise. | |
| */ | |
| boolean onTouch(View v, MotionEvent event); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a hover event is | |
| * dispatched to this view. The callback will be invoked before the hover | |
| * event is given to the view. | |
| */ | |
| public interface OnHoverListener { | |
| /** | |
| * Called when a hover event is dispatched to a view. This allows listeners to | |
| * get a chance to respond before the target view. | |
| * | |
| * @param v The view the hover event has been dispatched to. | |
| * @param event The MotionEvent object containing full information about | |
| * the event. | |
| * @return True if the listener has consumed the event, false otherwise. | |
| */ | |
| boolean onHover(View v, MotionEvent event); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a generic motion event is | |
| * dispatched to this view. The callback will be invoked before the generic motion | |
| * event is given to the view. | |
| */ | |
| public interface OnGenericMotionListener { | |
| /** | |
| * Called when a generic motion event is dispatched to a view. This allows listeners to | |
| * get a chance to respond before the target view. | |
| * | |
| * @param v The view the generic motion event has been dispatched to. | |
| * @param event The MotionEvent object containing full information about | |
| * the event. | |
| * @return True if the listener has consumed the event, false otherwise. | |
| */ | |
| boolean onGenericMotion(View v, MotionEvent event); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a view has been clicked and held. | |
| */ | |
| public interface OnLongClickListener { | |
| /** | |
| * Called when a view has been clicked and held. | |
| * | |
| * @param v The view that was clicked and held. | |
| * | |
| * @return true if the callback consumed the long click, false otherwise. | |
| */ | |
| boolean onLongClick(View v); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a drag is being dispatched | |
| * to this view. The callback will be invoked before the hosting view's own | |
| * onDrag(event) method. If the listener wants to fall back to the hosting view's | |
| * onDrag(event) behavior, it should return 'false' from this callback. | |
| * | |
| * <div class="special reference"> | |
| * <h3>Developer Guides</h3> | |
| * <p>For a guide to implementing drag and drop features, read the | |
| * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> | |
| * </div> | |
| */ | |
| public interface OnDragListener { | |
| /** | |
| * Called when a drag event is dispatched to a view. This allows listeners | |
| * to get a chance to override base View behavior. | |
| * | |
| * @param v The View that received the drag event. | |
| * @param event The {@link android.view.DragEvent} object for the drag event. | |
| * @return {@code true} if the drag event was handled successfully, or {@code false} | |
| * if the drag event was not handled. Note that {@code false} will trigger the View | |
| * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. | |
| */ | |
| boolean onDrag(View v, DragEvent event); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when the focus state of | |
| * a view changed. | |
| */ | |
| public interface OnFocusChangeListener { | |
| /** | |
| * Called when the focus state of a view has changed. | |
| * | |
| * @param v The view whose state has changed. | |
| * @param hasFocus The new focus state of v. | |
| */ | |
| void onFocusChange(View v, boolean hasFocus); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a view is clicked. | |
| */ | |
| public interface OnClickListener { | |
| /** | |
| * Called when a view has been clicked. | |
| * | |
| * @param v The view that was clicked. | |
| */ | |
| void onClick(View v); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when a view is context clicked. | |
| */ | |
| public interface OnContextClickListener { | |
| /** | |
| * Called when a view is context clicked. | |
| * | |
| * @param v The view that has been context clicked. | |
| * @return true if the callback consumed the context click, false otherwise. | |
| */ | |
| boolean onContextClick(View v); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when the context menu | |
| * for this view is being built. | |
| */ | |
| public interface OnCreateContextMenuListener { | |
| /** | |
| * Called when the context menu for this view is being built. It is not | |
| * safe to hold onto the menu after this method returns. | |
| * | |
| * @param menu The context menu that is being built | |
| * @param v The view for which the context menu is being built | |
| * @param menuInfo Extra information about the item for which the | |
| * context menu should be shown. This information will vary | |
| * depending on the class of v. | |
| */ | |
| void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when the status bar changes | |
| * visibility. This reports <strong>global</strong> changes to the system UI | |
| * state, not what the application is requesting. | |
| * | |
| * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) | |
| */ | |
| public interface OnSystemUiVisibilityChangeListener { | |
| /** | |
| * Called when the status bar changes visibility because of a call to | |
| * {@link View#setSystemUiVisibility(int)}. | |
| * | |
| * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, | |
| * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. | |
| * This tells you the <strong>global</strong> state of these UI visibility | |
| * flags, not what your app is currently applying. | |
| */ | |
| public void onSystemUiVisibilityChange(int visibility); | |
| } | |
| /** | |
| * Interface definition for a callback to be invoked when this view is attached | |
| * or detached from its window. | |
| */ | |
| public interface OnAttachStateChangeListener { | |
| /** | |
| * Called when the view is attached to a window. | |
| * @param v The view that was attached | |
| */ | |
| public void onViewAttachedToWindow(View v); | |
| /** | |
| * Called when the view is detached from a window. | |
| * @param v The view that was detached | |
| */ | |
| public void onViewDetachedFromWindow(View v); | |
| } | |
| /** | |
| * Listener for applying window insets on a view in a custom way. | |
| * | |
| * <p>Apps may choose to implement this interface if they want to apply custom policy | |
| * to the way that window insets are treated for a view. If an OnApplyWindowInsetsListener | |
| * is set, its | |
| * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} | |
| * method will be called instead of the View's own | |
| * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. The listener | |
| * may optionally call the parameter View's <code>onApplyWindowInsets</code> method to apply | |
| * the View's normal behavior as part of its own.</p> | |
| */ | |
| public interface OnApplyWindowInsetsListener { | |
| /** | |
| * When {@link View#setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) set} | |
| * on a View, this listener method will be called instead of the view's own | |
| * {@link View#onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. | |
| * | |
| * @param v The view applying window insets | |
| * @param insets The insets to apply | |
| * @return The insets supplied, minus any insets that were consumed | |
| */ | |
| public WindowInsets onApplyWindowInsets(View v, WindowInsets insets); | |
| } | |
| private final class UnsetPressedState implements Runnable { | |
| @Override | |
| public void run() { | |
| setPressed(false); | |
| } | |
| } | |
| /** | |
| * Base class for derived classes that want to save and restore their own | |
| * state in {@link android.view.View#onSaveInstanceState()}. | |
| */ | |
| public static class BaseSavedState extends AbsSavedState { | |
| String mStartActivityRequestWhoSaved; | |
| /** | |
| * Constructor used when reading from a parcel. Reads the state of the superclass. | |
| * | |
| * @param source | |
| */ | |
| public BaseSavedState(Parcel source) { | |
| super(source); | |
| mStartActivityRequestWhoSaved = source.readString(); | |
| } | |
| /** | |
| * Constructor called by derived classes when creating their SavedState objects | |
| * | |
| * @param superState The state of the superclass of this view | |
| */ | |
| public BaseSavedState(Parcelable superState) { | |
| super(superState); | |
| } | |
| @Override | |
| public void writeToParcel(Parcel out, int flags) { | |
| super.writeToParcel(out, flags); | |
| out.writeString(mStartActivityRequestWhoSaved); | |
| } | |
| public static final Parcelable.Creator<BaseSavedState> CREATOR = | |
| new Parcelable.Creator<BaseSavedState>() { | |
| public BaseSavedState createFromParcel(Parcel in) { | |
| return new BaseSavedState(in); | |
| } | |
| public BaseSavedState[] newArray(int size) { | |
| return new BaseSavedState[size]; | |
| } | |
| }; | |
| } | |
| /** | |
| * A set of information given to a view when it is attached to its parent | |
| * window. | |
| */ | |
| final static class AttachInfo { | |
| interface Callbacks { | |
| void playSoundEffect(int effectId); | |
| boolean performHapticFeedback(int effectId, boolean always); | |
| } | |
| /** | |
| * InvalidateInfo is used to post invalidate(int, int, int, int) messages | |
| * to a Handler. This class contains the target (View) to invalidate and | |
| * the coordinates of the dirty rectangle. | |
| * | |
| * For performance purposes, this class also implements a pool of up to | |
| * POOL_LIMIT objects that get reused. This reduces memory allocations | |
| * whenever possible. | |
| */ | |
| static class InvalidateInfo { | |
| private static final int POOL_LIMIT = 10; | |
| private static final SynchronizedPool<InvalidateInfo> sPool = | |
| new SynchronizedPool<InvalidateInfo>(POOL_LIMIT); | |
| View target; | |
| int left; | |
| int top; | |
| int right; | |
| int bottom; | |
| public static InvalidateInfo obtain() { | |
| InvalidateInfo instance = sPool.acquire(); | |
| return (instance != null) ? instance : new InvalidateInfo(); | |
| } | |
| public void recycle() { | |
| target = null; | |
| sPool.release(this); | |
| } | |
| } | |
| final IWindowSession mSession; | |
| final IWindow mWindow; | |
| final IBinder mWindowToken; | |
| final Display mDisplay; | |
| final Callbacks mRootCallbacks; | |
| IWindowId mIWindowId; | |
| WindowId mWindowId; | |
| /** | |
| * The top view of the hierarchy. | |
| */ | |
| View mRootView; | |
| IBinder mPanelParentWindowToken; | |
| boolean mHardwareAccelerated; | |
| boolean mHardwareAccelerationRequested; | |
| HardwareRenderer mHardwareRenderer; | |
| List<RenderNode> mPendingAnimatingRenderNodes; | |
| /** | |
| * The state of the display to which the window is attached, as reported | |
| * by {@link Display#getState()}. Note that the display state constants | |
| * declared by {@link Display} do not exactly line up with the screen state | |
| * constants declared by {@link View} (there are more display states than | |
| * screen states). | |
| */ | |
| int mDisplayState = Display.STATE_UNKNOWN; | |
| /** | |
| * Scale factor used by the compatibility mode | |
| */ | |
| float mApplicationScale; | |
| /** | |
| * Indicates whether the application is in compatibility mode | |
| */ | |
| boolean mScalingRequired; | |
| /** | |
| * If set, ViewRootImpl doesn't use its lame animation for when the window resizes. | |
| */ | |
| boolean mTurnOffWindowResizeAnim; | |
| /** | |
| * Left position of this view's window | |
| */ | |
| int mWindowLeft; | |
| /** | |
| * Top position of this view's window | |
| */ | |
| int mWindowTop; | |
| /** | |
| * Indicates whether views need to use 32-bit drawing caches | |
| */ | |
| boolean mUse32BitDrawingCache; | |
| /** | |
| * For windows that are full-screen but using insets to layout inside | |
| * of the screen areas, these are the current insets to appear inside | |
| * the overscan area of the display. | |
| */ | |
| final Rect mOverscanInsets = new Rect(); | |
| /** | |
| * For windows that are full-screen but using insets to layout inside | |
| * of the screen decorations, these are the current insets for the | |
| * content of the window. | |
| */ | |
| final Rect mContentInsets = new Rect(); | |
| /** | |
| * For windows that are full-screen but using insets to layout inside | |
| * of the screen decorations, these are the current insets for the | |
| * actual visible parts of the window. | |
| */ | |
| final Rect mVisibleInsets = new Rect(); | |
| /** | |
| * For windows that are full-screen but using insets to layout inside | |
| * of the screen decorations, these are the current insets for the | |
| * stable system windows. | |
| */ | |
| final Rect mStableInsets = new Rect(); | |
| /** | |
| * For windows that include areas that are not covered by real surface these are the outsets | |
| * for real surface. | |
| */ | |
| final Rect mOutsets = new Rect(); | |
| /** | |
| * The internal insets given by this window. This value is | |
| * supplied by the client (through | |
| * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will | |
| * be given to the window manager when changed to be used in laying | |
| * out windows behind it. | |
| */ | |
| final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets | |
| = new ViewTreeObserver.InternalInsetsInfo(); | |
| /** | |
| * Set to true when mGivenInternalInsets is non-empty. | |
| */ | |
| boolean mHasNonEmptyGivenInternalInsets; | |
| /** | |
| * All views in the window's hierarchy that serve as scroll containers, | |
| * used to determine if the window can be resized or must be panned | |
| * to adjust for a soft input area. | |
| */ | |
| final ArrayList<View> mScrollContainers = new ArrayList<View>(); | |
| final KeyEvent.DispatcherState mKeyDispatchState | |
| = new KeyEvent.DispatcherState(); | |
| /** | |
| * Indicates whether the view's window currently has the focus. | |
| */ | |
| boolean mHasWindowFocus; | |
| /** | |
| * The current visibility of the window. | |
| */ | |
| int mWindowVisibility; | |
| /** | |
| * Indicates the time at which drawing started to occur. | |
| */ | |
| long mDrawingTime; | |
| /** | |
| * Indicates whether or not ignoring the DIRTY_MASK flags. | |
| */ | |
| boolean mIgnoreDirtyState; | |
| /** | |
| * This flag tracks when the mIgnoreDirtyState flag is set during draw(), | |
| * to avoid clearing that flag prematurely. | |
| */ | |
| boolean mSetIgnoreDirtyState = false; | |
| /** | |
| * Indicates whether the view's window is currently in touch mode. | |
| */ | |
| boolean mInTouchMode; | |
| /** | |
| * Indicates whether the view has requested unbuffered input dispatching for the current | |
| * event stream. | |
| */ | |
| boolean mUnbufferedDispatchRequested; | |
| /** | |
| * Indicates that ViewAncestor should trigger a global layout change | |
| * the next time it performs a traversal | |
| */ | |
| boolean mRecomputeGlobalAttributes; | |
| /** | |
| * Always report new attributes at next traversal. | |
| */ | |
| boolean mForceReportNewAttributes; | |
| /** | |
| * Set during a traveral if any views want to keep the screen on. | |
| */ | |
| boolean mKeepScreenOn; | |
| /** | |
| * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). | |
| */ | |
| int mSystemUiVisibility; | |
| /** | |
| * Hack to force certain system UI visibility flags to be cleared. | |
| */ | |
| int mDisabledSystemUiVisibility; | |
| /** | |
| * Last global system UI visibility reported by the window manager. | |
| */ | |
| int mGlobalSystemUiVisibility; | |
| /** | |
| * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener | |
| * attached. | |
| */ | |
| boolean mHasSystemUiListeners; | |
| /** | |
| * Set if the window has requested to extend into the overscan region | |
| * via WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN. | |
| */ | |
| boolean mOverscanRequested; | |
| /** | |
| * Set if the visibility of any views has changed. | |
| */ | |
| boolean mViewVisibilityChanged; | |
| /** | |
| * Set to true if a view has been scrolled. | |
| */ | |
| boolean mViewScrollChanged; | |
| /** | |
| * Set to true if high contrast mode enabled | |
| */ | |
| boolean mHighContrastText; | |
| /** | |
| * Global to the view hierarchy used as a temporary for dealing with | |
| * x/y points in the transparent region computations. | |
| */ | |
| final int[] mTransparentLocation = new int[2]; | |
| /** | |
| * Global to the view hierarchy used as a temporary for dealing with | |
| * x/y points in the ViewGroup.invalidateChild implementation. | |
| */ | |
| final int[] mInvalidateChildLocation = new int[2]; | |
| /** | |
| * Global to the view hierarchy used as a temporary for dealng with | |
| * computing absolute on-screen location. | |
| */ | |
| final int[] mTmpLocation = new int[2]; | |
| /** | |
| * Global to the view hierarchy used as a temporary for dealing with | |
| * x/y location when view is transformed. | |
| */ | |
| final float[] mTmpTransformLocation = new float[2]; | |
| /** | |
| * The view tree observer used to dispatch global events like | |
| * layout, pre-draw, touch mode change, etc. | |
| */ | |
| final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); | |
| /** | |
| * A Canvas used by the view hierarchy to perform bitmap caching. | |
| */ | |
| Canvas mCanvas; | |
| /** | |
| * The view root impl. | |
| */ | |
| final ViewRootImpl mViewRootImpl; | |
| /** | |
| * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This | |
| * handler can be used to pump events in the UI events queue. | |
| */ | |
| final Handler mHandler; | |
| /** | |
| * Temporary for use in computing invalidate rectangles while | |
| * calling up the hierarchy. | |
| */ | |
| final Rect mTmpInvalRect = new Rect(); | |
| /** | |
| * Temporary for use in computing hit areas with transformed views | |
| */ | |
| final RectF mTmpTransformRect = new RectF(); | |
| /** | |
| * Temporary for use in computing hit areas with transformed views | |
| */ | |
| final RectF mTmpTransformRect1 = new RectF(); | |
| /** | |
| * Temporary list of rectanges. | |
| */ | |
| final List<RectF> mTmpRectList = new ArrayList<>(); | |
| /** | |
| * Temporary for use in transforming invalidation rect | |
| */ | |
| final Matrix mTmpMatrix = new Matrix(); | |
| /** | |
| * Temporary for use in transforming invalidation rect | |
| */ | |
| final Transformation mTmpTransformation = new Transformation(); | |
| /** | |
| * Temporary for use in querying outlines from OutlineProviders | |
| */ | |
| final Outline mTmpOutline = new Outline(); | |
| /** | |
| * Temporary list for use in collecting focusable descendents of a view. | |
| */ | |
| final ArrayList<View> mTempArrayList = new ArrayList<View>(24); | |
| /** | |
| * The id of the window for accessibility purposes. | |
| */ | |
| int mAccessibilityWindowId = AccessibilityNodeInfo.UNDEFINED_ITEM_ID; | |
| /** | |
| * Flags related to accessibility processing. | |
| * | |
| * @see AccessibilityNodeInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS | |
| * @see AccessibilityNodeInfo#FLAG_REPORT_VIEW_IDS | |
| */ | |
| int mAccessibilityFetchFlags; | |
| /** | |
| * The drawable for highlighting accessibility focus. | |
| */ | |
| Drawable mAccessibilityFocusDrawable; | |
| /** | |
| * Show where the margins, bounds and layout bounds are for each view. | |
| */ | |
| boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); | |
| /** | |
| * Point used to compute visible regions. | |
| */ | |
| final Point mPoint = new Point(); | |
| /** | |
| * Used to track which View originated a requestLayout() call, used when | |
| * requestLayout() is called during layout. | |
| */ | |
| View mViewRequestingLayout; | |
| /** | |
| * Creates a new set of attachment information with the specified | |
| * events handler and thread. | |
| * | |
| * @param handler the events handler the view must use | |
| */ | |
| AttachInfo(IWindowSession session, IWindow window, Display display, | |
| ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { | |
| mSession = session; | |
| mWindow = window; | |
| mWindowToken = window.asBinder(); | |
| mDisplay = display; | |
| mViewRootImpl = viewRootImpl; | |
| mHandler = handler; | |
| mRootCallbacks = effectPlayer; | |
| } | |
| } | |
| /** | |
| * <p>ScrollabilityCache holds various fields used by a View when scrolling | |
| * is supported. This avoids keeping too many unused fields in most | |
| * instances of View.</p> | |
| */ | |
| private static class ScrollabilityCache implements Runnable { | |
| /** | |
| * Scrollbars are not visible | |
| */ | |
| public static final int OFF = 0; | |
| /** | |
| * Scrollbars are visible | |
| */ | |
| public static final int ON = 1; | |
| /** | |
| * Scrollbars are fading away | |
| */ | |
| public static final int FADING = 2; | |
| public boolean fadeScrollBars; | |
| public int fadingEdgeLength; | |
| public int scrollBarDefaultDelayBeforeFade; | |
| public int scrollBarFadeDuration; | |
| public int scrollBarSize; | |
| public ScrollBarDrawable scrollBar; | |
| public float[] interpolatorValues; | |
| public View host; | |
| public final Paint paint; | |
| public final Matrix matrix; | |
| public Shader shader; | |
| public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); | |
| private static final float[] OPAQUE = { 255 }; | |
| private static final float[] TRANSPARENT = { 0.0f }; | |
| /** | |
| * When fading should start. This time moves into the future every time | |
| * a new scroll happens. Measured based on SystemClock.uptimeMillis() | |
| */ | |
| public long fadeStartTime; | |
| /** | |
| * The current state of the scrollbars: ON, OFF, or FADING | |
| */ | |
| public int state = OFF; | |
| private int mLastColor; | |
| public ScrollabilityCache(ViewConfiguration configuration, View host) { | |
| fadingEdgeLength = configuration.getScaledFadingEdgeLength(); | |
| scrollBarSize = configuration.getScaledScrollBarSize(); | |
| scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); | |
| scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); | |
| paint = new Paint(); | |
| matrix = new Matrix(); | |
| // use use a height of 1, and then wack the matrix each time we | |
| // actually use it. | |
| shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); | |
| paint.setShader(shader); | |
| paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); | |
| this.host = host; | |
| } | |
| public void setFadeColor(int color) { | |
| if (color != mLastColor) { | |
| mLastColor = color; | |
| if (color != 0) { | |
| shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, | |
| color & 0x00FFFFFF, Shader.TileMode.CLAMP); | |
| paint.setShader(shader); | |
| // Restore the default transfer mode (src_over) | |
| paint.setXfermode(null); | |
| } else { | |
| shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); | |
| paint.setShader(shader); | |
| paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); | |
| } | |
| } | |
| } | |
| public void run() { | |
| long now = AnimationUtils.currentAnimationTimeMillis(); | |
| if (now >= fadeStartTime) { | |
| // the animation fades the scrollbars out by changing | |
| // the opacity (alpha) from fully opaque to fully | |
| // transparent | |
| int nextFrame = (int) now; | |
| int framesCount = 0; | |
| Interpolator interpolator = scrollBarInterpolator; | |
| // Start opaque | |
| interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); | |
| // End transparent | |
| nextFrame += scrollBarFadeDuration; | |
| interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); | |
| state = FADING; | |
| // Kick off the fade animation | |
| host.invalidate(true); | |
| } | |
| } | |
| } | |
| /** | |
| * Resuable callback for sending | |
| * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. | |
| */ | |
| private class SendViewScrolledAccessibilityEvent implements Runnable { | |
| public volatile boolean mIsPending; | |
| public void run() { | |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); | |
| mIsPending = false; | |
| } | |
| } | |
| /** | |
| * <p> | |
| * This class represents a delegate that can be registered in a {@link View} | |
| * to enhance accessibility support via composition rather via inheritance. | |
| * It is specifically targeted to widget developers that extend basic View | |
| * classes i.e. classes in package android.view, that would like their | |
| * applications to be backwards compatible. | |
| * </p> | |
| * <div class="special reference"> | |
| * <h3>Developer Guides</h3> | |
| * <p>For more information about making applications accessible, read the | |
| * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> | |
| * developer guide.</p> | |
| * </div> | |
| * <p> | |
| * A scenario in which a developer would like to use an accessibility delegate | |
| * is overriding a method introduced in a later API version then the minimal API | |
| * version supported by the application. For example, the method | |
| * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available | |
| * in API version 4 when the accessibility APIs were first introduced. If a | |
| * developer would like his application to run on API version 4 devices (assuming | |
| * all other APIs used by the application are version 4 or lower) and take advantage | |
| * of this method, instead of overriding the method which would break the application's | |
| * backwards compatibility, he can override the corresponding method in this | |
| * delegate and register the delegate in the target View if the API version of | |
| * the system is high enough i.e. the API version is same or higher to the API | |
| * version that introduced | |
| * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. | |
| * </p> | |
| * <p> | |
| * Here is an example implementation: | |
| * </p> | |
| * <code><pre><p> | |
| * if (Build.VERSION.SDK_INT >= 14) { | |
| * // If the API version is equal of higher than the version in | |
| * // which onInitializeAccessibilityNodeInfo was introduced we | |
| * // register a delegate with a customized implementation. | |
| * View view = findViewById(R.id.view_id); | |
| * view.setAccessibilityDelegate(new AccessibilityDelegate() { | |
| * public void onInitializeAccessibilityNodeInfo(View host, | |
| * AccessibilityNodeInfo info) { | |
| * // Let the default implementation populate the info. | |
| * super.onInitializeAccessibilityNodeInfo(host, info); | |
| * // Set some other information. | |
| * info.setEnabled(host.isEnabled()); | |
| * } | |
| * }); | |
| * } | |
| * </code></pre></p> | |
| * <p> | |
| * This delegate contains methods that correspond to the accessibility methods | |
| * in View. If a delegate has been specified the implementation in View hands | |
| * off handling to the corresponding method in this delegate. The default | |
| * implementation the delegate methods behaves exactly as the corresponding | |
| * method in View for the case of no accessibility delegate been set. Hence, | |
| * to customize the behavior of a View method, clients can override only the | |
| * corresponding delegate method without altering the behavior of the rest | |
| * accessibility related methods of the host view. | |
| * </p> | |
| */ | |
| public static class AccessibilityDelegate { | |
| /** | |
| * Sends an accessibility event of the given type. If accessibility is not | |
| * enabled this method has no effect. | |
| * <p> | |
| * The default implementation behaves as {@link View#sendAccessibilityEvent(int) | |
| * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate | |
| * been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param eventType The type of the event to send. | |
| * | |
| * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) | |
| */ | |
| public void sendAccessibilityEvent(View host, int eventType) { | |
| host.sendAccessibilityEventInternal(eventType); | |
| } | |
| /** | |
| * Performs the specified accessibility action on the view. For | |
| * possible accessibility actions look at {@link AccessibilityNodeInfo}. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#performAccessibilityAction(int, Bundle) | |
| * View#performAccessibilityAction(int, Bundle)} for the case of | |
| * no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param action The action to perform. | |
| * @return Whether the action was performed. | |
| * | |
| * @see View#performAccessibilityAction(int, Bundle) | |
| * View#performAccessibilityAction(int, Bundle) | |
| */ | |
| public boolean performAccessibilityAction(View host, int action, Bundle args) { | |
| return host.performAccessibilityActionInternal(action, args); | |
| } | |
| /** | |
| * Sends an accessibility event. This method behaves exactly as | |
| * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an | |
| * empty {@link AccessibilityEvent} and does not perform a check whether | |
| * accessibility is enabled. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) | |
| * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param event The event to send. | |
| * | |
| * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) | |
| * View#sendAccessibilityEventUnchecked(AccessibilityEvent) | |
| */ | |
| public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { | |
| host.sendAccessibilityEventUncheckedInternal(event); | |
| } | |
| /** | |
| * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then | |
| * to its children for adding their text content to the event. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param event The event. | |
| * @return True if the event population was completed. | |
| * | |
| * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) | |
| */ | |
| public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { | |
| return host.dispatchPopulateAccessibilityEventInternal(event); | |
| } | |
| /** | |
| * Gives a chance to the host View to populate the accessibility event with its | |
| * text content. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) | |
| * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param event The accessibility event which to populate. | |
| * | |
| * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) | |
| * View#onPopulateAccessibilityEvent(AccessibilityEvent) | |
| */ | |
| public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { | |
| host.onPopulateAccessibilityEventInternal(event); | |
| } | |
| /** | |
| * Initializes an {@link AccessibilityEvent} with information about the | |
| * the host View which is the event source. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) | |
| * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param event The event to initialize. | |
| * | |
| * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) | |
| * View#onInitializeAccessibilityEvent(AccessibilityEvent) | |
| */ | |
| public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { | |
| host.onInitializeAccessibilityEventInternal(event); | |
| } | |
| /** | |
| * Initializes an {@link AccessibilityNodeInfo} with information about the host view. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) | |
| * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param info The instance to initialize. | |
| * | |
| * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) | |
| * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) | |
| */ | |
| public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { | |
| host.onInitializeAccessibilityNodeInfoInternal(info); | |
| } | |
| /** | |
| * Called when a child of the host View has requested sending an | |
| * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) | |
| * to augment the event. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) | |
| * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @param host The View hosting the delegate. | |
| * @param child The child which requests sending the event. | |
| * @param event The event to be sent. | |
| * @return True if the event should be sent | |
| * | |
| * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) | |
| * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) | |
| */ | |
| public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, | |
| AccessibilityEvent event) { | |
| return host.onRequestSendAccessibilityEventInternal(child, event); | |
| } | |
| /** | |
| * Gets the provider for managing a virtual view hierarchy rooted at this View | |
| * and reported to {@link android.accessibilityservice.AccessibilityService}s | |
| * that explore the window content. | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * | |
| * @return The provider. | |
| * | |
| * @see AccessibilityNodeProvider | |
| */ | |
| public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { | |
| return null; | |
| } | |
| /** | |
| * Returns an {@link AccessibilityNodeInfo} representing the host view from the | |
| * point of view of an {@link android.accessibilityservice.AccessibilityService}. | |
| * This method is responsible for obtaining an accessibility node info from a | |
| * pool of reusable instances and calling | |
| * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on the host | |
| * view to initialize the former. | |
| * <p> | |
| * <strong>Note:</strong> The client is responsible for recycling the obtained | |
| * instance by calling {@link AccessibilityNodeInfo#recycle()} to minimize object | |
| * creation. | |
| * </p> | |
| * <p> | |
| * The default implementation behaves as | |
| * {@link View#createAccessibilityNodeInfo() View#createAccessibilityNodeInfo()} for | |
| * the case of no accessibility delegate been set. | |
| * </p> | |
| * @return A populated {@link AccessibilityNodeInfo}. | |
| * | |
| * @see AccessibilityNodeInfo | |
| * | |
| * @hide | |
| */ | |
| public AccessibilityNodeInfo createAccessibilityNodeInfo(View host) { | |
| return host.createAccessibilityNodeInfoInternal(); | |
| } | |
| } | |
| private class MatchIdPredicate implements Predicate<View> { | |
| public int mId; | |
| @Override | |
| public boolean apply(View view) { | |
| return (view.mID == mId); | |
| } | |
| } | |
| private class MatchLabelForPredicate implements Predicate<View> { | |
| private int mLabeledId; | |
| @Override | |
| public boolean apply(View view) { | |
| return (view.mLabelForId == mLabeledId); | |
| } | |
| } | |
| private class SendViewStateChangedAccessibilityEvent implements Runnable { | |
| private int mChangeTypes = 0; | |
| private boolean mPosted; | |
| private boolean mPostedWithDelay; | |
| private long mLastEventTimeMillis; | |
| @Override | |
| public void run() { | |
| mPosted = false; | |
| mPostedWithDelay = false; | |
| mLastEventTimeMillis = SystemClock.uptimeMillis(); | |
| if (AccessibilityManager.getInstance(mContext).isEnabled()) { | |
| final AccessibilityEvent event = AccessibilityEvent.obtain(); | |
| event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); | |
| event.setContentChangeTypes(mChangeTypes); | |
| sendAccessibilityEventUnchecked(event); | |
| } | |
| mChangeTypes = 0; | |
| } | |
| public void runOrPost(int changeType) { | |
| mChangeTypes |= changeType; | |
| // If this is a live region or the child of a live region, collect | |
| // all events from this frame and send them on the next frame. | |
| if (inLiveRegion()) { | |
| // If we're already posted with a delay, remove that. | |
| if (mPostedWithDelay) { | |
| removeCallbacks(this); | |
| mPostedWithDelay = false; | |
| } | |
| // Only post if we're not already posted. | |
| if (!mPosted) { | |
| post(this); | |
| mPosted = true; | |
| } | |
| return; | |
| } | |
| if (mPosted) { | |
| return; | |
| } | |
| final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; | |
| final long minEventIntevalMillis = | |
| ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); | |
| if (timeSinceLastMillis >= minEventIntevalMillis) { | |
| removeCallbacks(this); | |
| run(); | |
| } else { | |
| postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); | |
| mPostedWithDelay = true; | |
| } | |
| } | |
| } | |
| private boolean inLiveRegion() { | |
| if (getAccessibilityLiveRegion() != View.ACCESSIBILITY_LIVE_REGION_NONE) { | |
| return true; | |
| } | |
| ViewParent parent = getParent(); | |
| while (parent instanceof View) { | |
| if (((View) parent).getAccessibilityLiveRegion() | |
| != View.ACCESSIBILITY_LIVE_REGION_NONE) { | |
| return true; | |
| } | |
| parent = parent.getParent(); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Dump all private flags in readable format, useful for documentation and | |
| * sanity checking. | |
| */ | |
| private static void dumpFlags() { | |
| final HashMap<String, String> found = Maps.newHashMap(); | |
| try { | |
| for (Field field : View.class.getDeclaredFields()) { | |
| final int modifiers = field.getModifiers(); | |
| if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { | |
| if (field.getType().equals(int.class)) { | |
| final int value = field.getInt(null); | |
| dumpFlag(found, field.getName(), value); | |
| } else if (field.getType().equals(int[].class)) { | |
| final int[] values = (int[]) field.get(null); | |
| for (int i = 0; i < values.length; i++) { | |
| dumpFlag(found, field.getName() + "[" + i + "]", values[i]); | |
| } | |
| } | |
| } | |
| } | |
| } catch (IllegalAccessException e) { | |
| throw new RuntimeException(e); | |
| } | |
| final ArrayList<String> keys = Lists.newArrayList(); | |
| keys.addAll(found.keySet()); | |
| Collections.sort(keys); | |
| for (String key : keys) { | |
| Log.d(VIEW_LOG_TAG, found.get(key)); | |
| } | |
| } | |
| private static void dumpFlag(HashMap<String, String> found, String name, int value) { | |
| // Sort flags by prefix, then by bits, always keeping unique keys | |
| final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); | |
| final int prefix = name.indexOf('_'); | |
| final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; | |
| final String output = bits + " " + name; | |
| found.put(key, output); | |
| } | |
| /** {@hide} */ | |
| public void encode(@NonNull ViewHierarchyEncoder stream) { | |
| stream.beginObject(this); | |
| encodeProperties(stream); | |
| stream.endObject(); | |
| } | |
| /** {@hide} */ | |
| @CallSuper | |
| protected void encodeProperties(@NonNull ViewHierarchyEncoder stream) { | |
| Object resolveId = ViewDebug.resolveId(getContext(), mID); | |
| if (resolveId instanceof String) { | |
| stream.addProperty("id", (String) resolveId); | |
| } else { | |
| stream.addProperty("id", mID); | |
| } | |
| stream.addProperty("misc:transformation.alpha", | |
| mTransformationInfo != null ? mTransformationInfo.mAlpha : 0); | |
| stream.addProperty("misc:transitionName", getTransitionName()); | |
| // layout | |
| stream.addProperty("layout:left", mLeft); | |
| stream.addProperty("layout:right", mRight); | |
| stream.addProperty("layout:top", mTop); | |
| stream.addProperty("layout:bottom", mBottom); | |
| stream.addProperty("layout:width", getWidth()); | |
| stream.addProperty("layout:height", getHeight()); | |
| stream.addProperty("layout:layoutDirection", getLayoutDirection()); | |
| stream.addProperty("layout:layoutRtl", isLayoutRtl()); | |
| stream.addProperty("layout:hasTransientState", hasTransientState()); | |
| stream.addProperty("layout:baseline", getBaseline()); | |
| // layout params | |
| ViewGroup.LayoutParams layoutParams = getLayoutParams(); | |
| if (layoutParams != null) { | |
| stream.addPropertyKey("layoutParams"); | |
| layoutParams.encode(stream); | |
| } | |
| // scrolling | |
| stream.addProperty("scrolling:scrollX", mScrollX); | |
| stream.addProperty("scrolling:scrollY", mScrollY); | |
| // padding | |
| stream.addProperty("padding:paddingLeft", mPaddingLeft); | |
| stream.addProperty("padding:paddingRight", mPaddingRight); | |
| stream.addProperty("padding:paddingTop", mPaddingTop); | |
| stream.addProperty("padding:paddingBottom", mPaddingBottom); | |
| stream.addProperty("padding:userPaddingRight", mUserPaddingRight); | |
| stream.addProperty("padding:userPaddingLeft", mUserPaddingLeft); | |
| stream.addProperty("padding:userPaddingBottom", mUserPaddingBottom); | |
| stream.addProperty("padding:userPaddingStart", mUserPaddingStart); | |
| stream.addProperty("padding:userPaddingEnd", mUserPaddingEnd); | |
| // measurement | |
| stream.addProperty("measurement:minHeight", mMinHeight); | |
| stream.addProperty("measurement:minWidth", mMinWidth); | |
| stream.addProperty("measurement:measuredWidth", mMeasuredWidth); | |
| stream.addProperty("measurement:measuredHeight", mMeasuredHeight); | |
| // drawing | |
| stream.addProperty("drawing:elevation", getElevation()); | |
| stream.addProperty("drawing:translationX", getTranslationX()); | |
| stream.addProperty("drawing:translationY", getTranslationY()); | |
| stream.addProperty("drawing:translationZ", getTranslationZ()); | |
| stream.addProperty("drawing:rotation", getRotation()); | |
| stream.addProperty("drawing:rotationX", getRotationX()); | |
| stream.addProperty("drawing:rotationY", getRotationY()); | |
| stream.addProperty("drawing:scaleX", getScaleX()); | |
| stream.addProperty("drawing:scaleY", getScaleY()); | |
| stream.addProperty("drawing:pivotX", getPivotX()); | |
| stream.addProperty("drawing:pivotY", getPivotY()); | |
| stream.addProperty("drawing:opaque", isOpaque()); | |
| stream.addProperty("drawing:alpha", getAlpha()); | |
| stream.addProperty("drawing:transitionAlpha", getTransitionAlpha()); | |
| stream.addProperty("drawing:shadow", hasShadow()); | |
| stream.addProperty("drawing:solidColor", getSolidColor()); | |
| stream.addProperty("drawing:layerType", mLayerType); | |
| stream.addProperty("drawing:willNotDraw", willNotDraw()); | |
| stream.addProperty("drawing:hardwareAccelerated", isHardwareAccelerated()); | |
| stream.addProperty("drawing:willNotCacheDrawing", willNotCacheDrawing()); | |
| stream.addProperty("drawing:drawingCacheEnabled", isDrawingCacheEnabled()); | |
| stream.addProperty("drawing:overlappingRendering", hasOverlappingRendering()); | |
| // focus | |
| stream.addProperty("focus:hasFocus", hasFocus()); | |
| stream.addProperty("focus:isFocused", isFocused()); | |
| stream.addProperty("focus:isFocusable", isFocusable()); | |
| stream.addProperty("focus:isFocusableInTouchMode", isFocusableInTouchMode()); | |
| stream.addProperty("misc:clickable", isClickable()); | |
| stream.addProperty("misc:pressed", isPressed()); | |
| stream.addProperty("misc:selected", isSelected()); | |
| stream.addProperty("misc:touchMode", isInTouchMode()); | |
| stream.addProperty("misc:hovered", isHovered()); | |
| stream.addProperty("misc:activated", isActivated()); | |
| stream.addProperty("misc:visibility", getVisibility()); | |
| stream.addProperty("misc:fitsSystemWindows", getFitsSystemWindows()); | |
| stream.addProperty("misc:filterTouchesWhenObscured", getFilterTouchesWhenObscured()); | |
| stream.addProperty("misc:enabled", isEnabled()); | |
| stream.addProperty("misc:soundEffectsEnabled", isSoundEffectsEnabled()); | |
| stream.addProperty("misc:hapticFeedbackEnabled", isHapticFeedbackEnabled()); | |
| // theme attributes | |
| Resources.Theme theme = getContext().getTheme(); | |
| if (theme != null) { | |
| stream.addPropertyKey("theme"); | |
| theme.encode(stream); | |
| } | |
| // view attribute information | |
| int n = mAttributes != null ? mAttributes.length : 0; | |
| stream.addProperty("meta:__attrCount__", n/2); | |
| for (int i = 0; i < n; i += 2) { | |
| stream.addProperty("meta:__attr__" + mAttributes[i], mAttributes[i+1]); | |
| } | |
| stream.addProperty("misc:scrollBarStyle", getScrollBarStyle()); | |
| // text | |
| stream.addProperty("text:textDirection", getTextDirection()); | |
| stream.addProperty("text:textAlignment", getTextAlignment()); | |
| // accessibility | |
| CharSequence contentDescription = getContentDescription(); | |
| stream.addProperty("accessibility:contentDescription", | |
| contentDescription == null ? "" : contentDescription.toString()); | |
| stream.addProperty("accessibility:labelFor", getLabelFor()); | |
| stream.addProperty("accessibility:importantForAccessibility", getImportantForAccessibility()); | |
| } | |
| } |